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Article

The Impulsive Coupled Langevin ψ-Caputo Fractional Problem with Slit-Strip-Generalized-Type Boundary Conditions

1
Department of Mathematics, University of Peshawar, Peshawar 25120, Khyber Pakhtunkhwa, Pakistan
2
Department of Basic Sciences and Humanities, CECOS University of IT and Emerging Sciences, Peshawar 25000, Khyber Pakhtunkhwa, Pakistan
3
Department of Computing, Mathematics and Electronics, “1 Decembrie 1918” University of Alba Iulia, 510009 Alba Iulia, Romania
4
Faculty of Mathematics and Computer Science, Transilvania University of Brasov, Iuliu Maniu Street 50, 500091 Brasov, Romania
5
Faculty of Science and Arts, Mohail Asser, King Khalid University, Abha 62529, Saudi Arabia
*
Authors to whom correspondence should be addressed.
Fractal Fract. 2023, 7(12), 837; https://doi.org/10.3390/fractalfract7120837
Submission received: 8 November 2023 / Revised: 20 November 2023 / Accepted: 22 November 2023 / Published: 25 November 2023

Abstract

:
In this paper, the existence of a unique solution is established for a coupled system of Langevin fractional problems of ψ -Caputo fractional derivatives with generalized slit-strip-type integral boundary conditions and impulses using the Banach contraction principle. We also find at least one solution to the aforementioned system using some assumptions and Schaefer’s fixed point theorem. After that, Ulam–Hyers stability is discussed. Finally, to provide additional support for the main results, pertinent examples are presented.

1. Introduction

Higher-order derivatives and n-fold integrals in ordinary calculus are considered only for the particular case when the order belongs to a set of natural numbers. Integrations and derivatives of any real number α > 0 are discussed in fractional calculus, in which the ordinary definitions of derivatives and integrals are considered as special cases, i.e., for when α belongs to a set of natural numbers. Fractional calculus has become increasingly significant owing to its wide-ranging uses in science. In the literature, there are more precise and mathematical representations of a range of phenomena modeled with the help of fractional derivatives [1,2,3]. Among the different qualitative properties of Fractional Differential Equations (FDEs), researchers investigated the existence of unique solutions to and stability analyses of FDEs under different conditions [4,5,6,7,8].
The Langevin equation is a great method for describing phenomena related to Brownian motion, and it may be used to successfully describe processes by economists, engineers, doctors, and other professionals. It was discovered that the Langevin equation, which was initially formulated by Langevin in 1908, is a useful tool for accurately describing the evolution of physical processes, including stochastic difficulties in various disciplines, including mechanical and electrical engineering, chemistry, physics, military systems, image processing, and astronomy. When the random oscillation force is assumed to be Gaussian, it is also utilized to characterize Brownian motion. For more details, see other studies [9,10,11]. Coupled system of FDEs are used in a variety of physical and practical models, including those that simulate diseases [12,13], the environment [14], chaotic systems [15], and many more. Ahmad et al. discussed basic applications of slit strip conditions in imaging and acoustics using strip detectors [16,17].
The authors of [18] investigated the existence of a unique solution to the following problem:
c D 0 + α ( σ ) = f ( σ , ( σ ) , c D 0 + β ( σ ) ) , σ [ 0 , 1 ] , ( 0 ) = 0 , ( 0 ) = 0 , , n 2 ( 0 ) = 0 , ( 0 ) + ( 0 ) = χ ( ) , 0 1 ( σ ) d σ = m ,
where c D 0 + α and c D 0 + β are Caputo Fractional Derivatives (CFDs) of order α with n 1 < α < n ( n 2 ) and 0 < β < 1 , respectively. m R and f : [ 0 , 1 ] × R 2 R , χ : C ( [ 0 , 1 ] , R ) R are continuous functions.
A coupled system of nonlinear FDEs was studied by Ahmad et al. [19],
c D 0 α 1 ( σ ) = h 1 ( σ , 1 ( σ ) , 2 ( σ ) ) , σ [ 0 , 1 ] , 1 < α 2 , c D 0 β 2 ( σ ) = h 2 ( σ , 1 ( σ ) , 2 ( σ ) ) , σ [ 0 , 1 ] , 1 < β 2 ,
with the coupled and uncoupled boundary conditions of the type:
1 ( 0 ) = 0 , 1 ( ν ) = d 1 0 μ 2 ( s ) d s + d 2 ν 1 1 2 ( s ) d s , 0 < μ < ν < ν 1 < 1 , 2 ( 0 ) = 0 , 2 ( ν ) = d 1 0 μ 1 ( s ) d s + d 2 ν 1 1 1 ( s ) d s , 0 < μ < ν < ν 1 < 1 , 1 ( 0 ) = 0 , 1 ( ν ) = d 1 0 μ 1 ( s ) d s + d 2 ν 1 1 1 ( s ) d s , 0 < μ < ν < ν 1 < 1 , 2 ( 0 ) = 0 , 2 ( ν ) = d 1 0 μ 2 ( s ) d s + d 2 ν 1 1 2 ( s ) d s , 0 < μ < ν < ν 1 < 1 ,
where c D 0 α and c D 0 β are CFDs of order α , β , respectively. h 1 , h 2 : [ 0 , 1 ] × R 2 R are given continuous functions and d 1 , d 2 R .
A coupled system of hybrid nonlinear FDEs was investigated by Ahmad et al. [20].
c D 0 α [ 1 ( σ ) h 1 ( σ , 1 ( σ ) , 2 ( σ ) ) ] = θ 1 ( σ , 1 ( σ ) , 2 ( σ ) ) , σ [ 0 , 1 ] , 1 < α 2 , c D 0 β [ 2 ( σ ) h 2 ( σ , 1 ( σ ) , 2 ( σ ) ) ] = θ 2 ( σ , 1 ( σ ) , 2 ( σ ) ) , σ [ 0 , 1 ] , 1 < β 2 ,
with coupled slit-strip-type integral boundary conditions:
1 ( 0 ) = 0 , 1 ( μ ) = d 1 0 ν 1 2 ( s ) d s + d 2 ν 2 1 2 ( s ) d s , 0 < ν 1 < μ < ν 2 < 1 , 2 ( 0 ) = 0 , 2 ( μ ) = d 1 0 ν 1 1 ( s ) d s + d 2 ν 2 1 1 ( s ) d s , 0 < ν 1 < μ < ν 2 < 1 ,
where c D 0 α with order α and c D 0 β with order β are CFDs. θ i , h i : [ 0 , 1 ] × R 2 R are continuous functions such that h i ( 0 , 1 ( 0 ) , 2 ( 0 ) ) = 0 , i = 1 , 2 and d 1 , d 2 R .
In 2022, Zhiwei et al. [21] studied the following coupled system:
c D σ k , σ α ; ψ [ 1 ( σ ) h 1 ( σ , 1 ( σ ) , c D σ k , σ α ; ψ 1 ( σ ) ) ] = j 1 ( σ , 1 ( σ ) , c D σ k , σ α ; ψ 1 ( σ ) ) , σ ( σ k , σ k + 1 ] , k = 0 , 1 , , p , c D σ k , σ β ; ψ [ 2 ( σ ) h 2 ( σ , 2 ( σ ) , c D σ k , σ β ; ψ 2 ( σ ) ) ] = j 2 ( σ , 2 ( σ ) , c D σ k , σ β ; ψ 2 ( σ ) ) , σ ( σ k , σ k + 1 ] , k = 0 , 1 , , p , 1 ( 0 ) = 0 , 1 ( η ) = a 1 σ k δ 2 k 1 ( σ ) d σ + a 2 δ 2 k + 1 σ k + 1 1 ( σ ) d σ , σ k < δ 2 k < η < δ 2 k + 1 < σ k + 1 , 2 ( 0 ) = 0 , 2 ( η ) = a 1 σ k δ 2 k 2 ( σ ) d σ + a 2 δ 2 k + 1 σ k + 1 2 ( σ ) d σ , σ k < δ 2 k < η < δ 2 k + 1 < σ k + 1 , Δ 1 ( σ k ) = 1 ( σ k + ) 1 ( σ k ) = I k ( 1 ( σ k ) ) , Δ 1 ( σ k ) = 1 ( σ k + ) 1 ( σ k ) = J k ( 1 ( σ k ) ) , k = 1 , 2 , , p , Δ 2 ( σ k ) = 2 ( σ k + ) 2 ( σ k ) = I k * ( 2 ( σ k ) ) , Δ 2 ( σ k ) = 2 ( σ k + ) 2 ( σ k ) = J k * ( 2 ( σ k ) ) , k = 1 , 2 , , p ,
where c D σ k , σ α ; ψ and c D σ k , σ β ; ψ denote the ψ -CFD of order α , β ( 1 , 2 ] , and J = [ 0 , R ] with R > 0 , h 1 , j 1 , h 2 , j 2 : J × R × R R are given continuous functions with h 1 ( 0 , 1 ( 0 ) , c D σ k , σ α ; ψ 1 ( 0 ) ) = 0 = h 2 ( 0 , 2 ( 0 ) , c D σ k , σ β ; ψ 2 ( 0 ) ) and a i are real constants for i = 1 , 2 .
In [22], Almaghamsi et al. investigated the following system:
c D γ i , μ ( c D σ i , μ + α i ) φ i ( t ) = Ξ i ( t , φ 1 ( t ) , φ 2 ( t ) ) , t [ a , b ] , i = 1 , 2 .
with boundary conditions
φ i ( a ) = 0 , I ϑ i , μ φ i ( b ) = 0 , c D σ 1 , μ φ 1 ( a ) = κ a ζ φ 2 ( s ) d s .
where for i = 1 , 2 , c D γ i , μ and c D σ i , μ are μ - CFD, 0 < σ i , γ 2 < 1 , 1 < γ 1 2 , α i , κ R .
In this paper, we investigate the coupled system of Langevin fractional problems of ψ -CFDs with generalized slit-strip-type integral boundary conditions and impulses:
c D σ k , σ γ 1 ; ψ ( c D σ k , σ β 1 ; ψ + α 1 ) ( σ ) = F 1 ( σ , ( σ ) , ( σ ) ) , σ ( σ k , σ k + 1 ] , k = 0 , 1 , , p , c D σ k , σ γ 2 ; ψ ( c D σ k , σ β 2 ; ψ + α 2 ) ( t ) = F 2 ( σ , ( σ ) , ( σ ) ) , σ ( σ k , σ k + 1 ] , k = 0 , 1 , , p , ( 0 ) = 0 , ( η ) = a 1 σ k δ 2 k ( τ ) d τ + a 2 δ 2 k + 1 σ k + 1 ( τ ) d τ , σ k < δ 2 k < η < δ 2 k + 1 < σ k + 1 , ( 0 ) = 0 , ( η ) = a 1 σ k δ 2 k ( τ ) d τ + a 2 δ 2 k + 1 σ k + 1 ( τ ) d τ , σ k < δ 2 k < η < δ 2 k + 1 < σ k + 1 , Δ ( σ k ) = ( σ k + ) ( σ k ) = I k ( ( σ k ) ) , Δ ( σ k ) = ( σ k + ) ( σ k ) = J k ( ( σ k ) ) , k = 1 , 2 , , p , Δ ( σ k ) = ( σ k + ) ( σ k ) = I k * ( ( σ k ) ) , Δ ( σ k ) = ( σ k + ) ( σ k ) = J k * ( ( σ k ) ) , k = 1 , 2 , , p ,
where c D σ k , σ γ i ; ψ and c D σ k , σ β i ; ψ denote the ψ -CFD with β i ( 0 , 1 ] , γ i ( 1 , 2 ] . J = [ 0 , T ] with T > 0 , F 1 , F 2 : J × R × R R are given continuous functions and a 1 , a 2 are real constants.
The subsequent sections of the paper are structured as follows: Section 2 presents some basic materials relevant to our results. The proof of a lemma that characterizes the solution of our problem is found in Section 3. In Section 4, the Shaefer fixed point theorem and the Banach contraction principle are applied to prove the existence and uniqueness of the problem, while Section 5 presents Ulam–Hyers stability for problem (1) and Section 6 provide examples, demonstrating our findings.

2. Preliminaries and Notations

Several definitions and results from this section are required later.
Definition 1 
([23]). Let F : [ 0 , 1 ] R be an integrable function and ψ : [ a 0 , b 0 ] R be an increasing and differentiable function such that ψ ( σ ) 0 for all σ [ a 0 , b 0 ] . Then, the left-sided ψ Riemann–Liouville (RL) fractional integral of order ( α > 0 ) is defined by
I a 0 + α ; ψ F ( σ ) = 1 Γ ( α ) a 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) α 1 F ( r ) d r ,
where Γ denotes the Euler Gamma function.
Definition 2 
([23]). Let F and ψ∈ C n ( [ a 0 , b 0 ] , R ) ( n N ) be functions where ψ ( σ ) is increasing and ψ ( σ ) 0 for all σ [ a 0 , b 0 ] . Then, the left-sided ψ-RL fractional derivative of order α of a function F is defined by
D a 0 + α ; ψ F ( σ ) = 1 ψ ( σ ) d d σ n I a 0 + n α ; ψ F ( σ ) = 1 Γ ( n α ) 1 ψ ( σ ) d d σ n a 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) n α 1 F ( r ) d r ,
where n = [ α ] + 1 and [ α ] denotes the integer part of the real number α.
Definition 3 
([23]). Let F and ψ∈ C n ( [ a 0 , b 0 ] , R ) ( n N ) be functions where ψ ( σ ) is increasing and ψ ( σ ) 0 for all σ [ a 0 , b 0 ] . Then, the left-sided ψ-CFD of order α ( α ( n 1 , n ) ) of a function F is defined by
c D a 0 + α ; ψ F ( σ ) = D a 0 + α ; ψ [ F ( σ ) l = 0 n 1 F ψ [ l ] ( a 0 ) l ! ( ψ ( σ ) ψ ( a 0 ) ) l ] ,
where F ψ [ l ] ( σ ) = ( 1 ψ ( σ ) d d σ ) l F ( σ ) and n = [ α ] + 1 for α N , n = α for α N .
Further, if F∈ C n ( [ a 0 , b 0 ] , R ) and α N , then
c D a 0 + α ; ψ F ( σ ) = I a 0 + n α ; ψ 1 ψ ( σ ) d d σ n F ( σ ) = 1 Γ ( n α ) a 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) n α 1 F ψ [ n ] ( r ) d r .
Thus, if α = n N , then c D a 0 + α ; ψ F ( σ ) = F ψ [ n ] ( σ ) .
Lemma 1 
([23]). For α > 0 ,
If F C ( [ a 0 , b 0 ] , R ) , then c D a 0 + α ; ψ I a 0 + α ; ψ F ( σ ) = F ( σ ) , σ [ a 0 , b 0 ] .
If F∈ C n ( [ a 0 , b 0 ] , R ) , n 1 < α < n , then
I a 0 + α ; ψ c D a 0 + α ; ψ F ( σ ) = F ( σ ) l = 0 n 1 c l ( ψ ( σ ) ψ ( a 0 ) ) l , σ [ a 0 , b 0 ] ,
where c l = F ψ [ l ] ( a 0 ) l ! .
Lemma 2 
(Contraction theorem [24]). Let a metric space X be complete and P : X X be a contraction on X. Then, P has unique fixed point.
Lemma 3 
(Arzela–Ascoli theorem [24]). Assume that X is a compact set in R n , n 1 . Then, a set S C ( X ) is relatively compact in C ( X ) if and only if the functions in S are uniformly bounded and equicontinuous on X.
Lemma 4 
(Schaefer’s fixed point theorem [24]). Let P : X × Y X × Y be a completely continuous operator. Consider a set G ( P ) = { ( , ) X × Y ; ( , ) = λ P ( , ) ; 0 < λ < 1 } . Then, either P has at least one fixed point or the set G ( P ) is unbounded.

3. Main Results

For σ k J k such that 0 = σ 0 < σ 1 < σ 2 < < σ p = T and J = J 0 J 1 J p , where J 0 = ( 0 , σ 1 ] , J 1 = ( σ 1 , σ 2 ] , , J p = ( σ p , σ p + 1 ] and J = J { σ 0 , σ 1 , , σ p } , we define the space X = { : J R | P C ( [ J , R ] ) , such that the right limits ( σ k + ) , ( σ k + ) and left limits ( σ k ) , ( σ k ) exist and Δ ( σ k ) = ( σ k + ) ( σ k ) , Δ ( σ k ) = ( σ k + ) ( σ k ) , k = 1 , 2 , , p }. Then, clearly, X is a Banach space equipped with the norm | | ( σ ) | | = max σ J | ( σ ) | . Similarly, define the space Y = { : J R | P C ( [ J , R ] ) , the right limits ( σ k + ) , ( σ k + ) and left limits ( σ k ) , ( σ k ) exist and Δ ( σ k ) = ( σ k + ) ( σ k ) , Δ ( σ k ) = ( σ k + ) ( σ k ) , k = 1 , 2 , , p }. Then, clearly, Y is a Banach space equipped with the norm | | ( t ) | | = max σ J | ( σ ) | .
Lemma 5. 
Let F 1 , F 2 be real-valued continuous functions on J . Then, the coupled system:
c D σ k , σ γ 1 ; ψ ( c D σ k , σ β 1 ; ψ + α 1 ) ( σ ) = F 1 ( σ ) , σ J , σ σ k , k = 0 , 1 , , p , c D σ k , σ γ 2 ; ψ ( c D σ k , σ β 2 ; ψ + α 2 ) ( σ ) = F 2 ( σ ) , σ J , σ σ k , k = 0 , 1 , , p ,
equipped with the boundary conditions given in (1) only has one solution, which is given by
( σ ) = 1 Γ ( γ 1 + β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) × 1 Δ [ 1 Γ ( γ 1 + β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ψ ( η ) ψ ( σ i ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i ( ( σ i ) ) ) a 1 σ k δ 2 k { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + I i ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i ( ( σ i ) ) ) } d τ a 2 δ 2 k + σ k + 1 { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + I i ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i ( ( σ i ) ) ) } d τ ] + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) J i ( ( σ i ) ) ) ,
( σ ) = 1 Γ ( γ 2 + β 2 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r ) d r α 2 Γ ( β 2 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 2 1 ( r ) d r + ( ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) · 1 Δ [ 1 Γ ( γ 2 + β 2 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r ) d r α 2 Γ ( β 2 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 2 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ψ ( η ) ψ ( σ i ) ψ ( σ i ) Γ ( γ 2 + β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 F 2 ( r ) d r α 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 2 ( r ) d r + I i * ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i * ( ( σ i ) ) ) a 1 σ k δ 2 k { 1 Γ ( γ 2 + β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r ) d r α 2 Γ ( β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 2 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 F 2 ( r ) d r α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + I i * ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i * ( ( σ i ) ) ) } d τ a 2 δ 2 k + σ k + 1 { 1 Γ ( γ 2 + β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r ) d r α 2 Γ ( β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 2 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 F 2 ( r ) d r α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + I i * ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i * ( ( σ i ) ) ) } d τ ] + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 2 + β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 F 2 ( r ) d r α 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 2 ( r ) d r + I i * ( ( σ i ) ) + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) J i * ( ( σ i ) ) ) ,
where
Δ = a 1 σ k δ 2 k ( ( ψ ( τ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) d τ + a 2 δ 2 k + 1 σ k + 1 ( ( ψ ( τ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) d τ ( ( ψ ( η ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) ,
and it is assumed that
Δ 0 .
Proof. 
Let
c D σ k , σ γ 1 ; ψ ( c D σ k , σ β 1 ; ψ + α 1 ) ( σ ) = F 1 ( σ ) .
Then, using Lemma 1 in the differential Equation (2), for any σ J 0 , there exist constants c 0 , c 1 R , such that:
( σ ) = I γ 1 + β 1 ; ψ F 1 ( σ ) α 1 I β 1 ; ψ ( σ ) + c 0 + c 1 ( ψ ( σ ) ψ ( σ 0 ) ) .
( σ ) = 1 Γ ( γ 1 + β 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 ( r ) d r + c 0 + c 1 ( ψ ( σ ) ψ ( σ 0 ) ) ,
Using the initial condition ( 0 ) = 0 , we get c 0 = 0 , so
( σ ) = 1 Γ ( γ 1 + β 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 ( r ) d r + c 1 ( ψ ( σ ) ψ ( σ 0 ) ) .
Furthermore, we obtain
( σ ) = 1 Γ ( γ 1 + β 1 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 Γ ( β 1 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 2 ( r ) d r + c 1 ψ ( σ ) .
For σ J 1 , there are d 0 , d 1 R such that
( σ ) = 1 Γ ( γ 1 + β 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 ( r ) d r + d 0 + d 1 ( ψ ( σ ) ψ ( σ 0 ) ) .
( σ ) = 1 Γ ( γ 1 + β 1 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 Γ ( β 1 1 ) σ 0 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 2 ( r ) d r + d 1 ψ ( σ ) .
Hence, it follows that
( σ 1 ) = 1 Γ ( γ 1 + β 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) β 1 1 ( r ) d r + c 1 ( ψ ( σ 1 ) ψ ( σ 0 ) ) ,
( σ 1 + ) = d 0 ,
( σ 1 ) = 1 Γ ( γ 1 + β 1 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 Γ ( β 1 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) β 1 2 ( r ) d r + c 1 ψ ( σ 1 ) ,
( σ 1 + ) = d 1 ψ ( σ 1 ) .
Using
Δ ( σ 1 ) = ( σ 1 + ) ( σ 1 ) = I 1 ( ( σ 1 ) ) , Δ ( σ 1 ) = ( σ 1 + ) ( σ 1 ) = J 1 ( ( σ 1 ) ) .
we obtain
d 0 = 1 Γ ( γ 1 + β 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) β 1 1 ( r ) d r + c 1 ( ψ ( σ 1 ) ψ ( σ 0 ) ) + I 1 ( ( σ 1 ) ) , d 1 = 1 ψ ( σ 1 ) Γ ( γ 1 + β 1 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 ψ ( σ 1 ) Γ ( β 1 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) β 1 2 ( r ) d r + c 1 + 1 ψ ( σ 1 ) J 1 ( ( σ 1 ) ) .
Thus,
( σ ) = 1 Γ ( γ 1 + β 1 ) σ 1 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ 1 σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 ( r ) d r + 1 Γ ( γ 1 + β 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) β 1 1 ( r ) d r + c 1 ( ψ ( σ 1 ) ψ ( σ 0 ) ) + I 1 ( ( σ 1 ) ) + c 1 ( ψ ( σ ) ψ ( σ 1 ) ) + ( ψ ( σ ) ψ ( σ 1 ) ) ψ ( σ 1 ) Γ ( γ 1 + β 1 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 ( ψ ( σ ) ψ ( σ 1 ) ) ψ ( σ 1 ) Γ ( β 1 1 ) σ 0 σ 1 ψ ( r ) ( ψ ( σ 1 ) ψ ( r ) ) β 1 2 ( r ) d r + ( ψ ( σ ) ψ ( σ 1 ) ) ψ ( σ 1 ) J 1 ( ( σ 1 ) ) , σ J 1 .
Similarly, for σ J k , k = 1 , 2 , , p , we have
( σ ) = 1 Γ ( γ 1 + β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 ( r ) d r + c 1 ( ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) + i = 1 p 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r + i = 1 p α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r i = 1 p α 1 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + i = 1 p I i ( ( σ i ) ) + i = 1 p ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) J i ( ( σ i ) ) .
Finally, applying ( η ) = a 1 σ k δ 2 k ( τ ) d τ + a 2 δ 2 k + 1 σ k + 1 ( τ ) d τ , we get the value of c 1 as
c 1 = 1 Δ [ 1 Γ ( γ 1 + β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) + ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) J i ( ( σ i ) ) ) a 1 σ k δ 2 k { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) J i ( ( σ i ) ) ) } d τ a 2 δ 2 k + 1 σ k + 1 { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r ) d r α 1 ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) J i ( ( σ i ) ) ) } d τ ] .
Putting (7) in (6), we obtain our required result (3) and similarly, we get (4). The converse of the lemma follows by direct computation. This concludes the proof. □

4. Existence Results for the Problem (1)

Here, we consider some hypotheses.
Hypothesis 1. 
For each σ J and 1 , 2 X , 1 , 2 Y , there exist positive constants M f 1 > 0 , N f 1 > 0 , such that
| F 1 ( σ , 1 ( σ ) , 1 ( σ ) ) F 1 ( σ , 2 ( σ ) , 2 ( σ ) ) | M f 1 | 1 ( σ ) 2 ( σ ) | + N f 1 | 1 ( σ ) 2 ( σ ) | .
Hypothesis 2. 
For each σ J and 1 , 2 X , 1 , 2 Y , there exist positive constants M f 2 > 0 , N f 2 > 0 , such that
| F 2 ( σ , 1 ( σ ) , 1 ( σ ) ) F 2 ( σ , 2 ( σ ) , 2 ( σ ) ) | M f 2 | 1 ( σ ) 2 ( σ ) | + N f 2 | 1 ( σ ) 2 ( σ ) | .
Hypothesis 3. 
For every 1 , 2 X and 1 , 2 Y , there exist constants A 1 , A 2 , A 3 , A 4 > 0 such that
| I k ( 1 ( σ k ) ) I k ( 2 ( σ k ) ) | A 1 | 1 ( σ k ) 2 ( σ k ) | ,
| J k ( 1 ( σ k ) ) J k ( 2 ( σ k ) ) | A 2 | 1 ( σ k ) 2 ( σ k ) | ,
| I k * ( 1 ( σ k ) ) I k * ( 2 ( σ k ) ) | A 3 | 1 ( σ k ) 2 ( σ k ) | ,
| J k * ( 1 ( σ k ) ) J k * ( 2 ( σ k ) ) | A 4 | 1 ( σ k ) 2 ( σ k ) | .
Hypothesis 4. 
There exist constants θ 0 , θ 1 and θ 2 such that
| F 1 ( σ , ( σ ) , ( σ ) ) | < θ 0 ( σ ) + θ 1 ( σ ) | ( σ ) | + θ 2 ( σ ) | ( σ ) | ,
with sup σ J θ 0 ( σ ) = θ 0 * , sup σ J θ 1 ( σ ) = θ 1 * , sup σ J θ 2 ( σ ) = θ 2 * .
There exist constants θ 3 , θ 4 and θ 5 such that
| F 2 ( σ , ( σ ) , ( σ ) ) | < θ 3 ( σ ) + θ 4 ( σ ) | ( σ ) | + θ 5 ( σ ) | ( σ ) | ,
with sup σ J θ 3 ( σ ) = θ 3 * , sup σ J θ 4 ( σ ) = θ 4 * , sup σ J θ 5 ( σ ) = θ 5 * .
Hypothesis 5. 
For each ( σ ) X , ( σ ) Y , there exist constants A 5 , A 6 , A 7 , A 8 , N 1 , N 2 , N 3 , N 4 > 0 such that the functions I k , J k , I k * , J k * : R R are continuous and satisfy the inequalities:
| I k ( ( σ k ) ) | A 5 | ( σ ) | + N 1 , | J k ( ( σ k ) ) | A 6 | ( σ ) | + N 2 ,
| I k * ( ( σ k ) ) | A 7 | ( σ ) | + N 3 , | J k * ( ( σ k ) ) | A 8 | ( σ ) | + N 4 ,
for k = 1, 2, …, p.
Let us define an operator P : X × Y X × Y such that
P ( , ) ( σ ) = ( P 1 ( , ) ( σ ) , P 2 ( , ) ( σ ) ) ,
where
P 1 ( , ) ( σ ) = 1 Γ ( γ 1 + β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r α 1 Γ ( β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) . 1 Δ [ 1 Γ ( γ 1 + β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r α 1 Γ ( β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ψ ( η ) ψ ( σ i ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r , ( r ) , ( r ) ) d r α 1 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i ( ( σ i ) ) ) a 1 σ k δ 2 k { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r , ( r ) , ( r ) ) d r α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + I i ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i ( ( σ i ) ) ) } d τ a 2 δ 2 k + σ k + 1 { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r , ( r ) , ( r ) ) d r α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + I i ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i ( ( σ i ) ) ) } d τ ] + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r , ( r ) , ( r ) ) d r α 1 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) J i ( ( σ i ) ) ) ,
P 2 ( , ) ( σ ) = 1 Γ ( γ 2 + β 2 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r , ( r ) , ( r ) ) d r α 2 Γ ( β 2 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) . 1 Δ [ 1 Γ ( γ 2 + β 2 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r , ( r ) , ( r ) ) d r α 2 Γ ( β 2 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 2 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( σ ) ) γ 2 + β 2 1 F 2 ( r , ( r ) , ( r ) ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ψ ( η ) ψ ( σ i ) ψ ( σ i ) Γ ( γ 2 + β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 F 2 ( r , ( r ) , ( r ) ) d r α 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 2 ( r ) d r + I i * ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i * ( ( σ i ) ) ) a 1 σ k δ 2 k { 1 Γ ( γ 2 + β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r , ( r ) , ( r ) ) d r α 2 Γ ( β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 2 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r , ( r ) , ( r ) ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 F 2 ( r , ( r ) , ( r ) ) d r α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + I i * ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i * ( ( σ i ) ) ) } d τ a 2 δ 2 k + σ k + 1 { 1 Γ ( γ 2 + β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r , ( r ) , ( r ) ) d r α 2 Γ ( β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 2 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r , ( r ) , ( r ) ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 F 2 ( r , ( r ) , ( r ) ) d r α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + I i * ( ( σ i ) ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) J i * ( ( σ i ) ) ) } d τ ] + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 F 2 ( r , ( r ) , ( r ) ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 2 + β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 F 2 ( r , ( r ) , ( r ) ) d r α 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 2 ( r ) d r + I i * ( ( σ i ) ) + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) J i * ( ( σ i ) ) ) .
Our first result is stated as follows.
Theorem 1. 
Assume that the conditions ( H 1 ) and ( H 2 ) are satisfied, and
Ω = max { Ω 1 , Ω 2 , Ω 3 , Ω 4 } < 1 ,
where the proof includes Ω 1 , Ω 2 , Ω 3 , and Ω 4 . Then, (1) has a unique solution.
Proof. 
Let ( , ) , ( ¯ , ¯ )   X × Y . Then,
| P 1 ( , ) ( σ ) P 1 ( ¯ , ¯ ) ( σ ) | 1 Γ ( γ 1 + β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 Γ ( β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + ( ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) 1 Δ [ 1 Γ ( γ 1 + β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 Γ ( β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + ψ ( η ) ψ ( σ i ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 | ( r ) ¯ ( r ) | d r + | I i ( ( σ i ) ) I i ( ¯ ( σ i ) ) | + ψ ( η ) ψ ( σ i ) ψ ( σ i ) | J i ( ( σ i ) ) J i ( ¯ ( σ i ) ) | ) + a 1 σ k δ 2 k { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + | I i ( ( σ i ) ) I i ( ¯ ( σ i ) ) | + ψ ( η ) ψ ( σ i ) ψ ( σ i ) | J i ( ( σ i ) ) J i ( ¯ ( σ i ) ) | ) } d τ + a 2 δ 2 k + σ k + 1 { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + | I i ( ( σ i ) ) I i ( ¯ ( σ i ) ) | + ψ ( η ) ψ ( σ i ) ψ ( σ i ) | J i ( ( σ i ) ) J i ( ¯ ( σ i ) ) | ) } d τ ] + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d s + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) ¯ ( r ) | d r + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) F 1 ( r , ¯ ( r ) , ¯ ( r ) ) | d r + α 1 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 | ( r ) ¯ ( r ) | d r + | I i ( ( σ i ) ) I i ( ¯ ( σ i ) ) | + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) | J i ( ( σ i ) ) J i ( ¯ ( σ i ) ) | ) .
| P 1 ( , ) ( σ ) P 1 ( ¯ , ¯ ) ( σ ) | ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) | | ¯ | | + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | [ ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( M f 1 | | ¯ | | + N f 1 | | ¯ | | ) + α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) | | ¯ | | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) | | ¯ | | + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) | | ¯ | + A 1 | | ¯ | | + A 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) | | ¯ | | ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) M f 1 | | ¯ | | + M f 1 | | ¯ | | + α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) | | ¯ | | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) | | ¯ | | + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) | | ¯ | | + A 1 | | ¯ | | ( δ 2 k σ k ) + A 2 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) | | ¯ | | ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) | | ¯ | | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) | | ¯ | | + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) | | ¯ | | + A 1 | | ¯ | | ( σ k + 1 δ 2 k + 1 ) + A 2 | | ¯ | | ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) ] + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) | | ¯ | | + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) | | ¯ | | + A 1 | | ¯ | | + A 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) | | ¯ | | ) .
| P 1 ( , ) ( σ ) P 1 ( ¯ , ¯ ) ( σ ) | [ M f 1 ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + ( ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) 1 | Δ | { M f 1 ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + M f 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 1 + A 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 M f 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) + M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) + A 1 ( δ 2 k σ k ) + A 2 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 M f 1 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + A 1 ( σ k + 1 δ 2 k + 1 ) + A 2 ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + M f 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 1 + A 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) ] | | ¯ | | + [ N f 1 ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) 1 | Δ | { N f 1 ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + N f 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ) + a 1 N f 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) ) + a 2 N f 1 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + N f 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ) ] | | ¯ | | .
Let
Ω 1 = [ M f 1 ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { M f 1 ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + M f 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 1 + A 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 M f 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) + M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) + A 1 ( δ 2 k σ k ) + A 2 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 M f 1 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) { ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) } + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + A 1 ( σ k + 1 δ 2 k + 1 ) + A 2 ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + M f 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 1 + A 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) ] ,
Ω 2 = [ N f 1 ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { N f 1 ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + N f 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ) + a 1 N f 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + i = 1 p N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) + a 2 N f 1 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + N f 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ] .
Then,
| P 1 ( , ) ( σ ) P 1 ( ¯ , ¯ ) ( σ ) | Ω 1 | | ¯ | | + Ω 2 | | ¯ | | .
Similarly,
| P 2 ( , ) ( σ ) P 2 ( ¯ , ¯ ) ( σ ) | Ω 3 | | ¯ | | + Ω 4 | | ¯ | | ,
where
Ω 3 = [ M f 2 ( ψ ( σ ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ ) ψ ( σ k ) ) β 2 Γ ( β 2 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { M f 2 ( ψ ( η ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 2 + 1 ) + i = 1 p ( M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) + M f 2 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) + α 2 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 ψ ( σ i ) Γ ( β 2 ) + A 3 + A 4 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 M f 2 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 2 + β 2 + 1 ψ ( δ 2 k ) Γ ( γ 2 + β 2 + 2 ) + α 2 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 2 + 1 ψ ( δ 2 k ) Γ ( β 2 + 2 ) + i = 1 p ( M f 2 ( δ 2 k σ k ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) ( δ 2 k σ k ) + M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 2 + β 2 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 2 ) + A 3 ( δ 2 k σ k ) + A 4 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 M f 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 Γ ( γ 2 + β 2 + 2 ) + α 2 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 2 + 1 ) Γ ( β 2 + 2 ) + i = 1 p ( M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) + M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 Γ ( γ 2 + β 2 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 Γ ( β 2 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + A 3 ( σ k + 1 δ 2 k + 1 ) + A 4 ψ ( σ i ) { ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) } ) } + i = 1 p ( M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) + M f 2 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) + α 2 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 ψ ( σ i ) Γ ( β 2 ) + A 3 + A 4 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) ] ,
Ω 4 = [ N f 2 ( ψ ( σ ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) × 1 | Δ | { N f 2 ( ψ ( η ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + i = 1 p ( N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + N f 2 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) ) + a 1 N f 2 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 2 + β 2 + 1 ψ ( δ 2 k ) Γ ( γ 2 + β 2 + 2 ) + i = 1 p N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( δ 2 k σ k ) + N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 2 + β 2 ) + a 2 N f 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 Γ ( γ 2 + β 2 + 2 ) + i = 1 p ( N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) + N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 Γ ( γ 2 + β 2 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + N f 2 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) ) ] .
As it is assumed that
max { Ω 1 , Ω 2 , Ω 3 , Ω 4 } = Ω < 1 .
we have
| P ( , ) ( σ ) P ( ¯ , ¯ ) ( σ ) | Ω ( | | ¯ | | + | | ¯ | | ) .
Then, from the above inequality we get that P is a contraction mapping and by the contraction principle P it has a unique fixed point. □
Theorem 2. 
Assume that the conditions ( H 1 ) ( H 5 ) are satisfied, then the coupled system (1) has at least one solution.
Proof. 
To prove that the coupled system (1) has at least one solution, we use Schaefer’s fixed point theorem. As F 1 , I and J are continuous functions, so P 1 is continuous. Furthermore, from the continuity of F 2 , I * , J * , the operator P 2 is continuous. This shows that P is continuous. Consider a set:
Q s = { ( , ) X × Y : | | ( , ) | | s } .
For any σ [ 0 , T ] , we have
| P 1 ( , ) ( σ ) | 1 Γ ( γ 1 + β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 | ( r ) | d r + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 Δ [ 1 Γ ( γ 1 + β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 1 1 | ( r ) | d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + ψ ( η ) ψ ( σ i ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 | ( r ) | d r + | I i ( ( σ i ) ) | + ψ ( η ) ψ ( σ i ) ψ ( σ i ) | J i ( ( σ i ) ) | ) + a 1 σ k δ 2 k { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 | ( r ) | d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + | I i ( ( σ i ) ) | + ψ ( η ) ψ ( σ i ) ψ ( σ i ) | J i ( ( σ i ) ) | ) } d τ + a 2 δ 2 k + σ k + 1 { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 | ( r ) | d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + | I i ( ( σ i ) ) | + ψ ( η ) ψ ( σ i ) ψ ( σ i ) | J i ( ( σ i ) ) | ) } d τ ] + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) | d s + α 1 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 | ( r ) | d r + | I i ( ( σ i ) ) | + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) | J i ( ( σ i ) ) | ) .
| P 1 ( , ) ( σ ) | ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) | ( r ) | + ( ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) 1 | Δ | [ ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) | ( r ) | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) | ( r ) | + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) | ( r ) | + A 5 | ( σ ) | + N 1 + ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ( A 6 | ( σ ) | + N 2 ) ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) | ( r ) | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) | ( r ) | + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) | ( r ) | + ( A 5 | ( r ) | + N 1 ) ( δ 2 k σ k ) + ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ( A 6 | ( r ) | + N 2 ) ) + a 2 ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) | ( r ) | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) | ( r ) | + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) | ( r ) | + ( A 5 | ( r ) | + N 1 ) ( σ k + 1 δ 2 k + 1 ) + ( A 6 | ( r ) | + N 2 ) ( ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) ] + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) | ( r ) | + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ( θ 0 ( r ) + θ 1 ( r ) | ( r ) | + θ 2 ( r ) | ( r ) | ) + α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) | ( r ) | + ( A 5 | ( r ) | + N 1 ) + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ( A 6 | ( r ) | + N 2 ) ) .
Let | ( r ) | s 1 and | ( r ) | s 2 ; then, we get
| P 1 ( , ) ( σ ) | ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + s 1 α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + ( ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) 1 | Δ | [ ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + s 1 α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + s 1 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + s 1 α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 5 s 1 + N 1 + ( A 6 s 1 + N 2 ) ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + r 1 α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + r 1 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + r 1 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) + ( A 5 s 1 + N 1 ) ( δ 2 k σ k ) + ( A 6 s 1 + N 2 ) ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + r 1 α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + s 1 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + s 1 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + ( A 5 s 1 + N 1 ) ( σ k + 1 δ 2 k + 1 ) + ( A 6 s 1 + N 2 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) ] + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + s 1 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ( θ 0 * + θ 1 * s 1 + θ 2 * s 2 ) + s 1 α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + ( A 5 s 1 + N 1 ) + ( A 6 s 1 + N 2 ) ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) = F 1 .
| P 1 ( , ) ( σ ) | F 1 .
Similarly,
| P 2 ( , ) ( σ ) | F 2 ,
where
F 2 = ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + ( ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) 1 | Δ | [ ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 7 s 2 + N 3 + ( A 8 s 2 + N 4 ) ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) + ( A 7 s 2 + N 3 ) ( δ 2 k σ k ) + ( A 8 s 2 + N 4 ) ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + ( A 7 s 2 + N 3 ) ( σ k + 1 δ 2 k + 1 ) + ( A 8 s 2 + N 4 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) ] + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ( θ 3 * + θ 4 * s 1 + θ 5 * s 2 ) + s 2 α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + ( A 7 s 2 + N 3 ) + ( A 8 s 2 + N 4 ) ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) .
Now, let max { F 1 , F 2 } = F . Then, we have
| | P ( , ) | | X × Y F .
The aforementioned inequality indicates the boundedness of the operator P . The operator P must then be demonstrated to be equicontinuous. For this, let ω 1 , ω 2 J k such that ω 1 < ω 2 , where k = 0 , 1 , , p .
Let ( , ) Q s ; then, we have
| P 1 ( , ) ( ω 2 ) P 1 ( , ) ( ω 1 ) | 1 Γ ( γ 1 + β 1 ) | σ k ω 2 ψ ( r ) ( ψ ( ω 2 ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r σ k ω 1 ψ ( r ) ( ψ ( ω 1 ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r | + α 1 Γ ( β 1 ) | σ k ω 2 ψ ( r ) ( ψ ( ω 2 ) ψ ( r ) ) β 1 1 ( r ) d r σ k ω 1 ψ ( r ) ( ψ ( ω 1 ) ψ ( r ) ) β 1 1 ( r ) d r | + { ( ψ ( ω 2 ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ( ψ ( ω 1 ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) } 1 | Δ | [ 1 Γ ( γ 1 + β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 1 1 | ( r ) | d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + ψ ( η ) ψ ( σ i ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 | ( r ) | d r + | I i ( ( σ i ) ) | + ψ ( η ) ψ ( σ i ) ψ ( σ i ) | J i ( ( σ i ) ) | ) + a 1 σ k δ 2 k { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 | ( r ) | d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + | I i ( ( σ i ) ) | + ψ ( η ) ψ ( σ i ) ψ ( σ i ) | J i ( ( σ i ) ) | ) } d τ + a 2 δ 2 k + σ k + 1 { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 | ( r ) | d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 | F 1 ( r , ( r ) , ( r ) ) | d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 | ( r ) | d r + | I i ( ( σ i ) ) | + ψ ( η ) ψ ( σ i ) ψ ( σ i ) | J i ( ( σ i ) ) | ) } d τ ] + | i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 F 1 ( r , ( r ) , ( r ) ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( ω 2 ) ψ ( σ i ) ) ( ψ ( ω 1 ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 F 1 ( r , ( r ) , ( r ) ) d r + α 1 ψ ( σ i ) Γ ( β 1 1 ) ( ( ψ ( ω 2 ) ψ ( σ i ) ) ( ψ ( ω 1 ) ψ ( σ i ) ) ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) I i ( ( σ i ) ) + ( ψ ( ω 2 ) ψ ( σ i ) ) ( ψ ( ω 1 ) ψ ( σ i ) ) ψ ( σ i ) J i ( ( σ i ) ) | .
From above inequality, if ω 1 ω 2 , we can deduce that
| P 1 ( , ) ( ω 2 ) P 1 ( , ) ( ω 1 ) | 0 .
In the same way, we can prove that
| P 2 ( , ) ( ω 2 ) P 2 ( , ) ( ω 1 ) | 0 .
Therefore, P 1 and P 2 are completely continuous according to the Arzila–Ascoli theorem. Thus, P is completely continuous.
Now, let us define a set:
G = { ( , ) X × Y ; ( , ) = λ P ( , ) ; 0 < λ < 1 } .
We need to prove that the set G is bounded. For σ J and ( , ) G , then ( , ) = λ P ( , ) , i.e.,
( σ ) = λ P 1 ( , ) and ( σ ) = λ P 2 ( , ) . Now,
| ( σ ) | = | λ P 1 ( , ) | .
| ( σ ) | λ [ ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) | ( r ) | + ( ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) ) 1 | Δ | { ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) | ( r ) | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) | ( r ) | + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) | ( r ) | + A 5 | ( σ ) | + N 1 + ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ( A 6 | ( σ ) | + N 2 ) ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) | ( r ) | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) | ( r ) | + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) | ( r ) | + ( A 5 | ( r ) | + N 1 ) ( δ 2 k σ k ) + ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ( A 6 | ( r ) | + N 2 ) ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) | ( r ) | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) | ( r ) | + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) | ( r ) | + ( A 5 | ( r ) | + N 1 ) ( σ k + 1 δ 2 k + 1 ) + ( A 6 | ( r ) | + N 2 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) | ( r ) | + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ( θ 0 * + θ 1 * | ( r ) | + θ 2 * | ( r ) | ) + α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) | ( r ) | + ( A 5 | ( r ) | + N 1 ) + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ( A 6 | ( r ) | + N 2 ) ) .
Let
M * = λ [ θ 1 * ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { θ 1 * ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + i = 1 p ( θ 1 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + θ 1 * ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 5 + A 6 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 θ 1 * ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) + i = 1 p ( θ 1 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) + θ 1 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) + A 5 ( δ 2 k σ k ) + A 6 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 θ 1 * ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) + i = 1 p ( θ 1 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + θ 1 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) { ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) } + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + A 5 ( σ k + 1 δ 2 k + 1 ) + A 6 ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( θ 1 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + θ 1 * ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 5 + A 6 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) .
| ( σ ) | λ 1 M * [ ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 2 * | ( r ) | ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 2 * | ( r ) | ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 2 * | ( r ) | ) + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ( θ 0 * + θ 2 * | ( r ) | ) + N 1 + N 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) ( θ 0 * + θ 2 * | ( r ) | ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) ( θ 0 * + θ 2 * | ( r ) | ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) ( θ 0 * + θ 2 * | ( r ) | ) + N 1 ( δ 2 k σ k ) + N 2 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) ( θ 0 * + θ 2 * | ( r ) | ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) ( θ 0 * + θ 2 * | ( r ) | ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ( θ 0 * + θ 2 * | ( r ) | ) + N 1 ( σ k + 1 δ 2 k + 1 ) + N 2 ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( θ 0 * + θ 2 * | ( r ) | ) + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ( θ 0 * + θ 2 * | ( r ) | ) + N 1 + N 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) = Z 1 .
Thus, there exists a positive constant Z 1 , such that | | | | X Z 1 .
Similarly, there exists Z 2 such that | | | | Y Z 2 , where
Z 2 = λ 1 N * [ ( ψ ( σ ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( θ 3 * + θ 4 * | ( r ) | ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) × 1 | Δ | { ( θ 3 * + θ 4 * | ( r ) | ) ( ψ ( η ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( θ 3 * + θ 4 * | ( r ) | ) + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) ( θ 3 * + θ 4 * | ( r ) | ) + N 3 + N 4 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 2 + β 2 + 1 ψ ( δ 2 k ) Γ ( γ 2 + β 2 + 2 ) ( θ 3 * + θ 4 * | ( r ) | ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( δ 2 k σ k ) ( θ 3 * + θ 4 * | ( r ) | ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 2 + β 2 ) ( θ 3 * + θ 4 * | ( r ) | ) + N 3 ( δ 2 k σ k ) + N 4 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 Γ ( γ 2 + β 2 + 2 ) ( θ 3 * + θ 4 * | ( r ) | ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) ( θ 3 * + θ 4 * | ( r ) | ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 Γ ( γ 2 + β 2 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ( θ 3 * + θ 4 * | ( r ) | ) + N 3 ( σ k + 1 δ 2 k + 1 ) + N 4 ψ ( σ i ) { ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) } ) } + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( θ 3 * + θ 4 * | ( r ) | ) + ( θ 3 * + θ 4 * | ( r ) | ) ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) + N 3 + N 4 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) .
and
N * = λ [ θ 5 * ( ψ ( σ ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ ) ψ ( σ k ) ) β 2 Γ ( β 2 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { θ 5 * ( ψ ( η ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( η ) ψ ( σ k ) ) β 2 Γ ( β 2 + 1 ) + i = 1 p ( θ 5 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) + θ 5 * ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) + α 2 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 ψ ( σ i ) Γ ( β 2 ) + A 7 + A 8 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 θ 5 * ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 2 + β 2 + 1 ψ ( δ 2 k ) Γ ( γ 2 + β 2 + 2 ) + α 2 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 2 + 1 ψ ( δ 2 k ) Γ ( β 2 + 2 ) + i = 1 p ( θ 5 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( δ 2 k σ k ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) ( δ 2 k σ k ) + θ 5 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 2 + β 2 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 2 ) + A 7 ( δ 2 k σ k ) + A 8 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 θ 5 * ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 Γ ( γ 2 + β 2 + 2 ) + α 2 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 2 + 1 ) Γ ( β 2 + 2 ) + i = 1 p ( θ 5 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) + θ 5 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 Γ ( γ 2 + β 2 ) { ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) } + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 Γ ( β 2 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + A 7 ( σ k + 1 δ 2 k + 1 ) + A 8 ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( θ 5 * ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) + θ 5 * ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) + α 2 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 ψ ( σ i ) Γ ( β 2 ) + A 7 + A 8 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) .
Let max { Z 1 , Z 2 } = Z . Then, we have | | ( , ) | | X × Y Z .
Thus, the set G is bounded, and the operator P has at least one fixed point according to Schaefer’s fixed point theorem., i.e., the problem (1) has at least one solution. □

5. Ulam’s Stability Results

This section is concerned with the Ulam–Hyers stability of problem (1). First, we present some definitions introduced in [25].
Definition 4. 
For ϵ = max { ϵ 1 , ϵ 2 } , consider the system of inequalities
| c D σ k , σ γ 1 ; ψ ( c D σ k , σ β 1 ; ψ + α 1 ) ( σ ) F 1 ( σ , ( σ ) , ( σ ) ) | < ϵ 1 , σ ( σ k , σ k + 1 ] , | Δ ( σ k ) I k ( ( σ k ) ) | < ϵ 1 , k = 1 , 2 , , p , | Δ ( σ k ) J k ( ( σ k ) ) | < ϵ 1 . | c D σ k , σ γ 2 ; ψ ( c D σ k , σ β 2 ; ψ + α 2 ) ( σ ) F 2 ( σ , ( σ ) , ( σ ) ) | < ϵ 2 , σ ( σ k , σ k + 1 ] , | Δ ( σ k ) I k * ( ( σ k ) ) | < ϵ 1 , k = 1 , 2 , , p , | Δ ( σ k ) J k * ( ( σ k ) ) | < ϵ 1 .
The system (1) is called Ulam–Hyers stable if we can find ϑ > 0 such that, for each solution ( ¯ , ¯ ) X × Y of ( 9 ) , there exists a solution ( , ) X × Y of the system ( 1 ) satisfying | | ( ¯ , ¯ ) ( , ) | | ϑ ϵ .
Remark 1. 
( ¯ , ¯ ) X × Y is a solution of the system of inequalities (9) if and only if there exist functions ϕ , ϕ * C ( ( σ k , σ k + 1 ] , R ) such that | ϕ | ϵ 1 and | ϕ * | ϵ 2 , σ ( σ k , σ k + 1 ] and
c D σ k , σ γ 1 ; ψ ( c D σ k , σ β 1 ; ψ + α 1 ) ( σ ) = F 1 ( σ , ( σ ) , ( σ ) ) + ϕ ( σ ) , σ ( σ k , σ k + 1 ] , k = 0 , 1 , , p , Δ ( σ k ) = I k ( ( σ k ) ) + ϕ k ( σ ) , k = 1 , 2 , , p , Δ ( σ k ) = J k ( ( σ k ) ) + ϕ k ( σ ) . c D σ k , σ γ 2 ; ψ ( c D σ k , σ β 2 ; ψ + α 2 ) ( σ ) = F 2 ( σ , ( σ ) , ( σ ) ) + ϕ * ( σ ) , σ ( σ k , σ k + 1 ] , k = 0 , 1 , , p , Δ ( σ k ) = I k * ( ( σ k ) ) + ϕ k * ( σ ) , k = 1 , 2 , , p , Δ y ( σ k ) = J k * ( ( σ k ) ) + ϕ k * ( σ ) .
Theorem 3. 
System ((1)) is Ulam–Hyers stable if ( H 1 ) and ( H 2 ) are met.
Proof. 
Suppose that ( ¯ , ¯ ) X × Y is the solution of the following inequality:
| c D σ k , σ γ 1 ; ψ ( c D σ k , σ β 1 ; ψ + α 1 ) ( σ ) F 1 ( σ , ( σ ) , ( σ ) ) | < ϵ 1 , σ ( σ k , σ k + 1 ] , | Δ ( σ k ) I k ( ( σ k ) ) | < ϵ 1 , k = 1 , 2 , , p , | Δ ( σ k ) J k ( ( σ k ) ) | < ϵ 1 . | c D σ k , σ γ 2 ; ψ ( c D σ k , σ β 2 ; ψ + α 2 ) ( σ ) F 2 ( σ , ( σ ) , ( σ ) ) | < ϵ 2 , σ ( σ k , σ k + 1 ] , | Δ ( σ k ) I k * ( ( σ k ) ) | < ϵ 1 , k = 1 , 2 , , p , | Δ ( σ k ) J k * ( ( σ k ) ) | < ϵ 1 .
From inequality (11)
c D σ k , σ γ 1 ; ψ ( c D σ k , σ β 1 ; ψ + α 1 ) ( σ ) = F 1 ( σ , ( σ ) , ( σ ) ) + ϕ ( σ ) , σ ( σ k , σ k + 1 ] , k = 0 , 1 , , p , Δ ( σ k ) = I k ( ( σ k ) ) + ϕ k ( σ ) , k = 1 , 2 , , p , Δ ( σ k ) = J k ( ( σ k ) ) + ϕ k ( σ ) . c D σ k , σ γ 2 ; ψ ( c D σ k , σ β 2 ; ψ + α 2 ) ( σ ) = F 2 ( σ , ( σ ) , ( σ ) ) + ϕ * ( σ ) , σ ( σ k , σ k + 1 ] , k = 0 , 1 , , p , Δ ( σ k ) = I k * ( ( σ k ) ) + ϕ k * ( σ ) , k = 1 , 2 , , p , Δ ( σ k ) = J k * ( ( σ k ) ) + ϕ k * ( σ ) .
Using Lemma 1, we get:
¯ ( σ ) = 1 Γ ( γ 1 + β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 1 + β 1 1 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r α 1 Γ ( β 1 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) . 1 Δ [ 1 Γ ( γ 1 + β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 1 + β 1 1 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r α 1 Γ ( β 1 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ψ ( η ) ψ ( σ i ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r α 1 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) + ϕ i ( σ i ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) ( J i ( ( σ i ) ) + ϕ i ( σ i ) ) ) a 1 σ k δ 2 k { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + I i ( ( σ i ) ) + ϕ i ( σ i ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) ( J i ( ( σ i ) ) + ϕ i ( σ i ) ) } d τ a 2 δ 2 k + σ k + 1 { 1 Γ ( γ 1 + β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 1 + β 1 1 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r α 1 Γ ( β 1 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 1 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + I i ( ( σ i ) ) + ϕ i ( σ i ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) ( J i ( ( σ i ) ) + ϕ i ( σ i ) ) ) } d τ ] + i = 1 p ( 1 Γ ( γ 1 + β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 1 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r + α 1 Γ ( β 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 1 ( r ) d r + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 1 + β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 1 + β 1 2 ( F 1 ( r , ( r ) , ( r ) ) + ϕ ( r ) ) d r α 1 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 1 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 1 2 ( r ) d r + I i ( ( σ i ) ) + ϕ i ( σ i ) + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ( J i ( ( σ i ) ) + ϕ i ( σ i ) ) ,
¯ ( σ ) = 1 Γ ( γ 2 + β 2 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) γ 2 + β 2 1 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r α 2 Γ ( β 2 ) σ k σ ψ ( r ) ( ψ ( σ ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) . 1 Δ [ 1 Γ ( γ 2 + β 2 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) γ 2 + β 2 1 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r α 2 Γ ( β 2 ) σ k η ψ ( r ) ( ψ ( η ) ψ ( r ) ) β 2 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ψ ( η ) ψ ( σ i ) ψ ( σ i ) Γ ( γ 2 + β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r α 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 2 ( r ) d r + I i * ( ( σ i ) ) + ϕ i * ( σ i ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) ( J i * ( ( σ i ) ) + ϕ i * ( σ i ) ) a 1 σ k δ 2 k { 1 Γ ( γ 2 + β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 2 + β 2 1 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r α 2 Γ ( β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 2 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + I i * ( ( σ i ) ) + ϕ i * ( σ i ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) ( J i * ( ( σ i ) ) + ϕ i * ( σ i ) ) } d τ a 2 δ 2 k + σ k + 1 { 1 Γ ( γ 2 + β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) γ 2 + β 2 1 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r α 2 Γ ( β 2 ) σ k τ ψ ( r ) ( ψ ( τ ) ψ ( r ) ) β 2 1 ( r ) d r + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( τ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + I i * ( ( σ i ) ) + ϕ i * ( σ i ) + ψ ( η ) ψ ( σ i ) ψ ( σ i ) ( J i * ( ( σ i ) ) + ϕ i * ( σ i ) ) } d τ ] + i = 1 p ( 1 Γ ( γ 2 + β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 1 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r + α 2 Γ ( β 2 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 1 ( r ) d r + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( γ 2 + β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) γ 2 + β 2 2 ( F 2 ( r , ( r ) , ( r ) ) + ϕ * ( r ) ) d r α 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) Γ ( β 2 1 ) σ i 1 σ i ψ ( r ) ( ψ ( σ i ) ψ ( r ) ) β 2 2 ( r ) d r + I i * ( ( σ i ) ) + ϕ i * ( σ i ) + ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ( J i * ( ( σ i ) ) + ϕ i * ( σ i ) ) .
Now, as ( , ) is the solution of ( 1 ) and ( ¯ , ¯ ) is the solution of ( 11 ) . Then,
| ( σ ) ¯ ( σ ) | ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) | | ¯ | | + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | [ ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | ) + α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) | | ¯ | | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) | | ¯ | | + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) | | ¯ | + A 1 | | ¯ | | + A 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) | | ¯ | | ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) | | ¯ | | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) | | ¯ | | + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) | | ¯ | | + A 1 | | ¯ | | ( δ 2 k σ k ) + A 2 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) | | ¯ | | ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) | | ¯ | | + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) | | ¯ | | + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) | | ¯ | | + A 1 | | ¯ | | ( σ k + 1 δ 2 k + 1 ) + A 2 | | ¯ | | ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) ] + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) | | ¯ | | + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) M f 1 | | ¯ | | + N f 1 | | ¯ | | + | ϕ ( r ) | + α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) | | ¯ | | + A 1 | | ¯ | | + A 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) | | ¯ | | ) .
| ( σ ) ¯ ( σ ) | [ M f 1 ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { M f 1 ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + M f 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + A 1 + A 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) + α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) ) + a 1 M f 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) + M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) + A 1 ( δ 2 k σ k ) + A 2 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 M f 1 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) { ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) } + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + A 1 ( σ k + 1 δ 2 k + 1 ) + A 2 ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + M f 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 1 + A 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) ] | | x x ¯ | | + [ N f 1 ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { N f 1 ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + N f 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ) + a 1 N f 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + i = 1 p N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) + a 2 N f 1 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + N f 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ] | | y y ¯ | | + [ ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ] ϵ 1 .
Let
ω 1 = [ M f 1 ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { M f 1 ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( η ) ψ ( σ k ) ) β 1 Γ ( β 1 + 1 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + M f 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 1 + A 2 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 M f 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + α 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 1 + 1 ψ ( δ 2 k ) Γ ( β 1 + 2 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( δ 2 k σ k ) + M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 1 ) + A 1 ( δ 2 k σ k ) + A 2 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 M f 1 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + α 1 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 1 + 1 ) Γ ( β 1 + 2 ) + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) { ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) } + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 Γ ( β 1 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + A 1 ( σ k + 1 δ 2 k + 1 ) + A 2 ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( M f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + α 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 Γ ( β 1 + 1 ) + M f 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + α 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 1 1 ψ ( σ i ) Γ ( β 1 ) + A 1 + A 2 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) ] ,
ω 2 = [ N f 1 ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { N f 1 ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + i = 1 p N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + N f 1 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + a 1 N f 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) ) + a 2 N f 1 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) { ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) } ) } + i = 1 p N f 1 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + N f 1 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ] ,
ω 3 = [ ( ψ ( σ ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { ( ψ ( η ) ψ ( σ k ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 1 + β 1 + 1 ψ ( δ 2 k ) Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( δ 2 k σ k ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 1 + β 1 ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 1 + β 1 + 1 Γ ( γ 1 + β 1 + 2 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) ( σ k + 1 δ 2 k + 1 ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 Γ ( γ 1 + β 1 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 Γ ( γ 1 + β 1 + 1 ) + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 1 + β 1 1 ψ ( σ i ) Γ ( γ 1 + β 1 ) ) ] .
Then,
| | ¯ | | ω 1 | | ¯ | | + ω 2 | | ¯ | | + ω 3 ϵ 1 .
Similarly,
| | ¯ | | ω 4 | | ¯ | | + ω 5 | | ¯ | | + ω 6 ϵ 2 ,
where
ω 4 = [ M f 2 ( ψ ( σ ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ ) ψ ( σ k ) ) β 2 Γ ( β 2 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { M f 2 ( ψ ( η ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( η ) ψ ( σ k ) ) β 2 Γ ( β 2 + 1 ) + i = 1 p ( M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) + M f 2 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) + α 2 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 ψ ( σ i ) Γ ( β 2 ) + A 3 + A 4 ( ψ ( η ) ψ ( σ i ) ) ψ ( σ i ) ) + a 1 M f 2 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 2 + β 2 + 1 ψ ( δ 2 k ) Γ ( γ 2 + β 2 + 2 ) + α 2 ( ψ ( δ 2 k ) ψ ( σ k ) ) β 2 + 1 ψ ( δ 2 k ) Γ ( β 2 + 2 ) + i = 1 p ( M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( δ 2 k σ k ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) ( δ 2 k σ k ) + M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 2 + β 2 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( β 2 ) + A 3 ( δ 2 k σ k ) + A 4 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) ) + a 2 M f 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 Γ ( γ 2 + β 2 + 2 ) + α 2 ( ( ψ ( σ k + 1 ) ψ ( σ k ) ) β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) β 2 + 1 ) Γ ( β 2 + 2 ) + i = 1 p ( M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) + M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 Γ ( γ 2 + β 2 ) { ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) } + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 Γ ( β 2 ) ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) + A 3 ( σ k + 1 δ 2 k + 1 ) + A 4 ψ ( σ i ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( M f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + α 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 Γ ( β 2 + 1 ) + M f 2 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) + α 2 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) β 2 1 ψ ( σ i ) Γ ( β 2 ) + A 3 + A 4 ( ψ ( σ ) ψ ( σ i ) ) ψ ( σ i ) ) ] ,
ω 5 = [ N f 2 ( ψ ( σ ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { N f 2 ( ψ ( η ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + i = 1 p ( N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + N f 2 ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) ) + a 1 N f 2 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 2 + β 2 + 1 ψ ( δ 2 k ) Γ ( γ 2 + β 2 + 2 ) + i = 1 p N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( δ 2 k σ k ) + N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 1 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 2 + β 2 ) + a 2 N f 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 Γ ( γ 2 + β 2 + 2 ) + i = 1 p ( N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) + N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 Γ ( γ 2 + β 2 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p N f 2 ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + N f 2 ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) ] ,
ω 6 = [ ( ψ ( σ ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + ( ψ ( σ ) ψ ( σ k ) ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) 1 | Δ | { ( ψ ( η ) ψ ( σ k ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + ( ψ ( η ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) + a 1 ( ψ ( δ 2 k ) ψ ( σ k ) ) γ 2 + β 2 + 1 ψ ( δ 2 k ) Γ ( γ 2 + β 2 + 2 ) + i = 1 p ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( δ 2 k σ k ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ( ψ ( δ 2 k ) ψ ( σ i ) ) 2 ψ ( σ i ) ψ ( δ 2 k ) Γ ( γ 2 + β 2 ) + a 2 ( ψ ( σ k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 ( ψ ( δ 2 k + 1 ) ψ ( σ k ) ) γ 2 + β 2 + 1 Γ ( γ 2 + β 2 + 2 ) + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) ( σ k + 1 δ 2 k + 1 ) + ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 Γ ( γ 2 + β 2 ) ( ψ ( σ k + 1 ) ψ ( σ i ) ) 2 ψ ( σ k + 1 ) ( ψ ( δ 2 k + 1 ) ψ ( σ i ) ) 2 ψ ( δ 2 k + 1 ) ) } + i = 1 p ( ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 Γ ( γ 2 + β 2 + 1 ) + ( ψ ( σ ) ψ ( σ i ) ) ( ψ ( σ i ) ψ ( σ i 1 ) ) γ 2 + β 2 1 ψ ( σ i ) Γ ( γ 2 + β 2 ) ) ] .
Now, let max { ϵ 1 , ϵ 2 } = ϵ and max { ω 1 , ω 2 , ω 4 , ω 5 } = ω . Then,
| | ¯ | | + | | ¯ | | ω ( | | ¯ | | + | | ¯ | | ) + ( ω 3 + ω 6 ) ϵ .
| | ¯ | | + | | ¯ | | ω 3 + ω 6 1 ω ϵ .
Let
ϑ = ω 3 + ω 6 1 ω .
Hence, we have
| | ( , ) ( ¯ , ¯ ) | | X × Y ϑ ϵ .
Thus, system ( 1 ) is UH stable. □

6. Example

Example 1. 
c D 5 3 ; ( c D 1 3 ; + 1 130 ) ( σ ) = 220 ( 1 + ( σ ) ) , σ [ 0 , 1 ] , σ 2 3 , c D 7 5 ; ( c D 1 3 ; + 1 310 ) ( σ ) = cos ( σ ) 330 ( 1 + ) , σ [ 0 , 1 ] , σ 2 3 , I 1 ( 2 3 ) = ( σ ) 150 + ( | ( σ ) | ) , J 1 ( 2 3 ) = ( σ ) 160 + ( | ( σ ) | ) , I 1 * ( 2 3 ) = 1 170 + | ( σ ) | , J 1 * ( 2 3 ) = 1 180 + | ( σ ) | , ( 0 ) = 0 , ( 9 10 ) = 1 2 0 2 5 ( τ ) d τ + 9 10 3 5 7 10 ( τ ) d τ , ( 0 ) = 0 , ( 1 2 ) = 9 10 0 2 5 ( τ ) d τ + 9 10 3 5 7 10 ( τ ) d τ .
We see in the proposed problem that β 1 = β 2 = 1 3 , γ 1 = 5 3 , γ 2 = 7 5 , η = 1 2 and a 1 = a 2 = 9 10 .
| F 1 ( σ , ( σ ) , ( σ ) ) F 1 ( σ , ¯ ( σ ) , ¯ ( σ ) ) | 1 220 | ( σ ) ¯ ( σ ) | + 1 220 | ( σ ) ¯ ( σ ) | , σ [ 0 , e ] , | F 2 ( σ , ( σ ) , ( σ ) ) F 2 ( σ , ¯ ( σ ) , ¯ ( σ ) ) | π 330 | ( σ ) ¯ ( σ ) | + 1 330 | ( σ ) ¯ ( σ ) | , | I 1 ( 3 5 ) I 1 ¯ ( 3 5 ) | 1 150 | ( σ ) ¯ ( σ ) | , | J 1 ( 3 5 ) J 1 ¯ ( 3 5 ) | 1 160 | ( σ ) ¯ ( σ ) | , | I 1 * ( 3 5 ) I 1 * ¯ ( 3 5 ) | 1 170 | ( σ ) ¯ ( σ ) | , | J 1 * ( 3 5 ) J 1 * ¯ ( 3 5 ) | 1 180 | ( σ ) ¯ ( σ ) | .
From the above inequalities, we obtain that M F 1 = 1 220 , N F 1 = 1 220 , M F 2 = π 330 , N F 2 = π 330 , A 1 = 1 150 , A 2 = 1 160 , A 3 = 1 170 , A 4 = 1 180 . On calculating Ω 1 , Ω 2 , Ω 3 and Ω 4 , we have Ω 1 = 0.268317 < 1 , Ω 2 = 0.173521 < 1 , Ω 3 = 0.321975 < 1 and Ω 4 = 0.576319 < 1 . Then, max { Ω 1 , Ω 2 , Ω 3 , Ω 4 } < 1 , and the coupled system (1) has a unique solution.
Furthermore, on calculating ϑ = 47.29356436833 and ϵ = 0.01276 , we get ϑ ϵ = 0.60346588134 > 0 . Therefore, the coupled system (1) is Ulam–Hyers stable.
Example 2. 
c D 4 3 ; e ( c D 1 2 ; e + 1 110 ) ( σ ) = s i n ( + ) 360 ( l n ( σ ) + 1 ) , σ [ 0 , 1 ] , σ 3 5 , c D 5 4 ; e ( c D 1 2 ; e + 1 210 ) ( σ ) = a r c t a n ( σ ) 450 + | + | , σ [ 0 , 1 ] , σ 3 5 , I 1 ( 3 5 ) = 1 420 + | ( σ ) | , J 1 ( 3 5 ) = 1 550 + | ( σ ) | , I 1 * ( 3 5 ) = 1 880 + | ( σ ) | , J 1 * ( 3 5 ) = 1 910 + | ( σ ) | , ( 0 ) = 0 , ( 1 3 ) = 0 1 4 ( τ ) d τ + 1 2 2 3 ( τ ) d τ , ( 0 ) = 0 , ( 1 3 ) = 0 1 4 ( τ ) d τ + 1 2 2 3 ( τ ) d τ .
We see in the proposed problem that β 1 = β 2 = 1 2 , γ 1 = 4 3 , γ 2 = 5 4 , η = 1 3 and a 1 = a 2 = 1 .
| F 1 ( σ , ( σ ) , ( σ ) ) F 1 ( σ , ¯ ( σ ) , ¯ ( σ ) ) | 1 360 | ( σ ) ¯ ( σ ) | + 1 360 | ( σ ) ¯ ( σ ) | , σ [ 0 , e ] , | F 2 ( σ , ( σ ) , ( σ ) ) F 2 ( σ , ¯ ( σ ) , ¯ ( σ ) ) | π 450 | ( σ ) ¯ ( σ ) | + π 450 | ( σ ) ¯ ( σ ) | , | I 1 ( 3 5 ) I 1 ¯ ( 3 5 ) | 1 420 | ( σ ) ¯ ( σ ) | , | J 1 ( 3 5 ) J 1 ¯ ( 3 5 ) | 1 550 | ( σ ) ¯ ( σ ) | , | I 1 * ( 3 5 ) I 1 * ¯ ( 3 5 ) | 1 880 | ( σ ) ¯ ( σ ) | , | J 1 * ( 3 5 ) J 1 * ¯ ( 3 5 ) | 1 910 | ( σ ) ¯ ( σ ) | .
From the above inequalities, we obtain that M F 1 = 1 360 , N F 1 = 1 360 , M F 2 = π 450 , N F 2 = π 450 , A 1 = 1 420 , A 2 = 1 550 , A 3 = 1 880 , A 4 = 1 910 . On calculating Ω 1 , Ω 2 , Ω 3 and Ω 4 , we have Ω 1 = 0.177405 < 1 , Ω 2 = 0.04251 < 1 , Ω 3 = 0.169955 < 1 and Ω 4 = 0.09639 < 1 . Then, max { Ω 1 , Ω 2 , Ω 3 , Ω 4 } < 1 , and the coupled system (1) has a unique solution.
Furthermore, on calculating ϑ = 32.71784770711 and ϵ = 0.002385 , we get ϑ ϵ = 0.07803206678 > 0 . Therefore, the coupled system (1) is Ulam–Hyers stable.

7. Conclusions

The existence of a unique solution to a coupled system of Langevin fractional problems of ψ -Caputo fractional derivatives with generalized slit-strip-type integral boundary conditions and impulses was examined. We have used Schaefer’s fixed point theorem for the existence of at least one solution to our proposed problem. We applied the Banach contraction principle to ensure that the solution of the proposed problem was unique. Additionally, we investigated the Ulam–Hyers stability of the suggested problem. The Ulam–Hyers stability guarantees that we can achieve an exact distinction for any approximation in a given region, allowing us to use the results in approximation theory and numerical analyses of related problems. Lastly, we presented illustrations to support the results.

Author Contributions

Conceptualization, H.N.A.K., A.Z., I.-L.P. and S.B.M.; Methodology, H.N.A.K., A.Z., I.-L.P. and S.B.M.; Formal analysis, I.-L.P. and S.B.M.; Investigation, H.N.A.K., A.Z. and I.-L.P.; Resources, I.-L.P. and S.B.M.; Writing—original draft, H.N.A.K., A.Z., I.-L.P. and S.B.M.; Supervision, I.-L.P. and A.Z. All authors have read and approved the final version of the manuscript.

Funding

Sana Ben Moussa extends her appreciation to the Deanship of Scientific Research at King Khalid University through the large group Research Project under grant number RGP2/47/44.

Data Availability Statement

No new data were created or analyzed in this study. Data sharing is not applicable to this article.

Conflicts of Interest

The authors declare no conflict of interest.

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MDPI and ACS Style

Ali Khan, H.N.; Zada, A.; Popa, I.-L.; Ben Moussa, S. The Impulsive Coupled Langevin ψ-Caputo Fractional Problem with Slit-Strip-Generalized-Type Boundary Conditions. Fractal Fract. 2023, 7, 837. https://doi.org/10.3390/fractalfract7120837

AMA Style

Ali Khan HN, Zada A, Popa I-L, Ben Moussa S. The Impulsive Coupled Langevin ψ-Caputo Fractional Problem with Slit-Strip-Generalized-Type Boundary Conditions. Fractal and Fractional. 2023; 7(12):837. https://doi.org/10.3390/fractalfract7120837

Chicago/Turabian Style

Ali Khan, Haroon Niaz, Akbar Zada, Ioan-Lucian Popa, and Sana Ben Moussa. 2023. "The Impulsive Coupled Langevin ψ-Caputo Fractional Problem with Slit-Strip-Generalized-Type Boundary Conditions" Fractal and Fractional 7, no. 12: 837. https://doi.org/10.3390/fractalfract7120837

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