Some New Applications of the q -Analogous of Differential and Integral Operators for New Subclasses of q -Starlike and q -Convex Functions

: In the geometric function theory of complex analysis, the investigation of the geometric properties of analytic functions using q -analogues of differential and integral operators is an important area of study, offering powerful tools for applications in numerical analysis and the solution of differential equations. Many topics, including complex analysis, hypergeometric series


Introduction and Definitions
Since the dawn of analytic function theory, when Alexander [1] introduced the first integral operator in 1915, differential and integral operators have been the subject of scholarly research.Novel combinations of differential and integral operators are constantly being invented (see [2,3]).Sȃlȃgean and Ruscheweyh operators have great importance in research [4][5][6][7].Recent research on differential and integral operators from several perspectives, including quantum calculus, has produced remarkable findings that have applications in other branches of physics and mathematics.Some fascinating uses of differential and integral operators are highlighted in a recent survey-cum-expository review study [8].Some examples of publications on the extension of Sȃlȃgean differential operators are included in [9,10], with examples of q-extensions in [11][12][13][14][15][16][17][18]).
The theory of real and complex-order integrals and derivatives has been used in the study of geometric functions, and it has also shown potential for mathematical modeling and analysis of practical concerns in the applied sciences.Analyzing the dynamics of dengue transmission [19] and creating a novel model of the human liver [20] are both examples of studies that are included within the aforementioned field of research.
In particular, the family of integral operators related to the first-kind Lommel functions was introduced in [21] and is crucial for understanding both pure and applied mathematics.It is now possible to examine differential equations from the perspectives of functional analysis and operator theory due to differential operators.Differential operator properties are employed to solve differential equations using the operator technique.For the integral operators introduced in this work, several interesting geometric and mapping features are also deduced.In this line of study, we use the concepts of quantum operator theory and introduce the q-analogues of the differential operator, then consider this operator.We also introduce two new integral operators in this paper.From the viewpoints of operator theory and functional analysis, the study of differential equations utilizes operators, and with more investigation, it might be discovered that such operators play a role in solving partial differential equations.
In the open unit disc U = {z ∈ C : |z| < 1}, let A stand for the collection of all analytic functions, and let every f ∈ A in this set have a series of the form: The class T is a subclass of A, and every f ∈ T has a series of the form For 0 ≤ α < 1, let S * (α) stand for the set of all star-shaped functions of order α, which we define as follows: For α = 0, S * (0) = S * .
The convolution of the functions f , g ∈ A is denoted by where f (z) is defined by Equation (1), and Definition 1 ([22]).If K 1 and K 2 are two analytic functions in the open unit disk (U), if there is an analytic function (u 0 ) in U, then K 1 is subordinate to K 2 , (K 1 ≺ K 2 ) with u 0 (0) = 0, and |u 0 (z)| < 1 Definition 2 ([22]).Let ψ : U × C 3 −→ C and h is univalent in U.If s is analytic in U and the following differential subordination conditions hold: then s is the solution of the differential subordination.Dominant refers to the univalent function (r) if s ≺ r for all s satisfying (3).A dominant r satisfying r ≺ r for all dominants r of ( 3) is said to be the best dominant of (3).Up to a rotation of U, the best dominant is unique.
Geometric function theory, q-difference equations, and q-integral equations are only a few examples of the recent generalization of quantum (q-) calculus across many areas of mathematics and science.Starting with the basics of q-calculus theory, Jackson [23] introduced the q-derivative and q-integral operators; then, Ismail et al. [24] defined qstarlike functions using the same ideas.After the q-difference operator was introduced, a rush of studies examined the q-analogues of other differential operators.In order to build a new class of analytic functions in the conic domain, Kanas and Raducanu [25] created the q-analogue of the Ruscheweyh differential operator.The multivalent generalizations were later provided by Arif et al. [26].Using the basics of q-calculus, Zang et al. [27] constructed a generalized conic domain and studied a new category of q-starlike functions in this context.Geometric function theory (GFT) and q-calculus theory both have been the subject of a great deal of research by numerous mathematicians to date (for details, see [28][29][30][31][32][33][34]).It has been established that time-scale calculus, a more general branch of mathematics, involves quantum calculus.Time-scale calculus enables the investigation of dynamic equations according to a cogent framework in both discrete and continuous domains.
The main contribution of this study is the quantum calculus operator theory.We develop several new forms of q-analogues of the differential and integral operators using the fundamental principles of quantum calculus operator theory and the q-difference operator.Using these operators, we build many new classes of q-starlike and q-convex functions and investigate several interesting features of the analytic function ( f ) that belongs to these classes.Definition 3. Jackson [23] provided the following definition of the q-difference (or derivative) operator (∂ q ) for analytic functions ( f ), where q ∈ (0, 1).
where [j] q is the q-number and defined as: The factorial of q, [j] q ! is identified as follows: Definition 4. Jackson [35] defined the q-integral for the function f ∈ A as follows: By using the same technique of the Al-Oboudi differential operator [36], now we define the q-analogues of the Al-Oboudi differential operator (D m λ,q ) for analytic functions as follows: Definition 5.For λ ≥ 0, q ∈ (0, 1), m, n ∈ N, and f ∈ A, the operator D m λ,q : A → A, is defined by After some simple calculation, we have Remark 1.For the function ( f ) of the form (2), the series expansion of D m λ,q is given by: Remark 2. Specifically, when λ = 1, the operator D m λ,q simplifies to the Sȃlȃgean q-differential operator given by [37].Remark 3. If q → 1−, then we obtain the Al-Oboudi differential operator studied in [36].
The Ruscheweyh q-differential operator (R n q ) was developed by Kanas and Raducanu utilizing fundamental concepts from operator theory in quantum mechanics.Very intriguing aspects of this operator in the conic domain were explored; they also created a new subclass of q-starlike functions connected to the conic domain.

Definition 6 ([25]
).To define the operator R n q : A → A for n ∈ N and f ∈ A, we write The standard quantum calculus has been extensively studied by numerous mathematicians, physicists, and engineers.Applications in areas including engineering, economics, mathematics, and other disciplines have helped q-calculus improve in a number of ways.If we consider the above facts about q-calculus in many areas, it is safe to assume that q-calculus has functioned as the interface between mathematics and physics throughout the last three decades.In addition, the q-calculus operator, the q-integral operator, and the q-derivative operator are used to build several classes of regular functions and play an intriguing role, since they are used and applied in many different branches of mathematics, including the theory of relativity, the calculus of variations, orthogonal polynomials, and basic hypergeometric functions.In [39], Akça et al. used the q-derivative and generated solutions to some differential equations.Therefore, we have also made use of q-calculus and provide certain important new types of q-analogues of differential and integral operators, as mentioned in this paper.Non-commutative q-calculus is a generalization of classical calculus as developed by Newton and Leibnitz.This q-derivative may be used with any function whose domain of definition does not include 0. When q equals 1, the result simplifies to the standard derivative; that is, the results obtained by the q-differential and integral operators are quite effective and efficient.
Here, we define the q-analogues of differential operator DR m,n λ,q by using the definition of convolution on the newly defined differential operator D m λ,q and the Ruscheweyh qdifferential operator R n q .This newly defined operator will help us to define two new integral operators introduced in this study.Definition 7.For f ∈ A, n, m ∈ N = {1, 2, 3 . ..} and λ ≥ 0, the q-analogues of differential operator DR m,n λ,q is defined by Using ( 5) and ( 6) in (7) and applying the definition of convolution, we obtain the following series expansion of DR m,n λ,q : Remark 5.The series expansion of DR m,n λ,q for the function ( f ) of type (2) is as follows: where λ ≥ 0, m, n ∈ N. The following identity holds for the function f ∈ T: The following formulation introduces two new integral operators, F m,n,q λ,γ 1, γ 2,... γ l and G m,n,q λ,γ 1, γ 2,... γ l , while considering the convolution operator DR m,n λ,q f (z): Definition 8.For functions f i ∈ T, and γ i ∈ R, i ∈ {1, 2, 3 . . . ,l}, the integral operators F m,n,q λ,γ 1, γ 2,... γ l and G m,n,q λ,γ 1, γ 2,... γ l are defined as follows: where λ ≥ 0, q ∈ (0, 1), m, n ∈ N, and z ∈ U.
We establish several new types of q-starlike and q-convex functions by utilizing the q-difference operator and the q-analogues of the differential operator DR m,n λ,q provided in Definition 7.

Definition 9.
Let an analytic function ( f ) of the form (2) be a member of class R(δ, q), if it satisfies the following inequality Re   z∂ q DR m,n λ,q f (z) DR m,n λ,q f (z)   < δ, for all z ∈ U, and δ > 1.
Definition 10.Let an analytic function ( f ) of the form (2) be a member of class C(δ, q) if it satisfies the following inequality Definition 11.Let an analytic function ( f ) of the form (2) be a member of class RA(β, µ, q), if where 0 ≤ β < 1, and 0 < µ ≤ 1.
In the following definitions, we consider integral operators F m,n,q λ,γ 1, γ 2,... γ l and G m,n,q λ,γ 1, γ 2,... γ l given in Definition 8, and we define two new subclasses of q-convex functions: This article is composed of four sections.We briefly reviewed some fundamental geometric function theory ideas, investigated some new q-analogues of differential and integral operators, and considered these operators to define a number of new subclasses of q-starlike and q-convex functions in Section 1 because they were important to our main finding.In Section 2, we provide some known lemmas and investigate some new lemmas that are used to prove our main results.In Section 3, we present our key findings, and in Section 4, we provide concluding remarks.

Set of Lemmas
Here, we provide some previously established lemmas and prove four new ones that are used in the proof of our key findings.

Lemma 2 ([42]
).Let an analytic function (p) be in the open unit disk (U) and where p(z) is the best dominant.

Lemma 3 ([22]
).Consider the case when p is univalent and φ is analytic in the set of all p(U).If zp (z) is starlike and where p(z) is the best dominant.
Lemma 4 ([43]).For complex numbers, α, β and γ and γ = 0. Let analytic functions s and p be in U, and p be a convex univalent; suppose that Re α γ then, s(z) ≺ p(z), and the function p(z) is the best dominant.Now, we generalize the lemmas introduced in [22,43] by using the fundamentals of q-calculus operator theory.Lemma 5. Consider the case when p is univalent and φ is analytic in the set of all p(U).If z∂ q p(z) is starlike and then, ψ(z) ≺ p(z), and p(z) is the best dominant.
Proof.Suppose that φ is analytic in a domain containing p(U) and p is analytic in U.
Letting q → 1− in (11) and (12) yields which is starlike; then, Then, from the lemma in [22], we obtain ψ(z) ≺ p(z), and p(z) is the best dominant.Lemma 6.We assume that p and h are analytic in U and that h is convex and univalent in U, where α, ϑ, γ ∈ C. Furthermore, we assume Re α γ If p(z) is analytic in U and then, p(z) ≺ h(z), and h(z) is the best dominant.
Proof.Suppose that p and h are analytic in U. Letting q → 1− in ( 13) and ( 14), we have then, from the lemma in [43], we obtain p(z) ≺ h(z), and h(z) is the best dominant.
We obtain , where We calculate the expression We find (10). .
We calculate the expression We find
For q → 1−, we obtain known result that were proven in [44].

Subordination Results:
In this paper, we generalize Lemmas 1 and 2 to the operator DR m,n λ,q f (z).
Theorem 7. Assuming h is both convex and univalent, ς = 0, and If the differential subordination condition for f ∈ T holds, then then, DR m+1,n λ,q f (z) We achieved . Thus, By using (8) in (20), we obtain We deduce from (8) that Therefore, the differential subordination in ( 18) becomes Using Lemma 6, we obtain where h is the best dominant.
For q → 1−, we obtain the result proven in [44].

Corollary 8 ([44]
).Let h be both convex and univalent, ς = 0, and Theorem 8.For h(0) = 0, ς = 0. Let h be univalent in U and z∂ q h(z) h(z) be both univalent and starlike in U.If the differential subordination condition for f ∈ T holds, then where the best dominant function is h.
By using Lemma 5, we obtain DR m,n λ,q f (z) where h is the best dominant.
For q → 1−, we obtain the result proven in [44].
Corollary 9 ([44]).For h(0) = 0, ς = 0. Let h be univalent in U, and zh (z) h(z) be univalent and starlike in U.The differential subordination condition is satisfied if and only if f ∈ T

Conclusions
This study presents a modification of previous work that used quantum calculus to better understand geometric function theory.In this study, first of all, in Section 1, we defined the convolution operator DR m,n λ,q inspired by the q-Sȃlȃgean operator and the Ruscheweyh q-differential operator.Then, using the operator DR m,n λ,q , two new integral operators, F m,n,q λ,γ 1, γ 2,... γ l (z) and G m,n,q λ,γ 1, γ 2,... γ l (z), were introduced.Some new subclasses of analytic functions were introduced by means of these operators.In Section 2, four innovative lemmas that are connected to the new integral operators and were used in the justifications of the first findings in Sections 3 were proven.In Section 3, we first determined the sufficient conditions in Theorems 1 and 2 for the functions from class T to belong to classes LAF and LAG.Next, in Theorems 3-6, we proved some new properties of the integral operators F m,n,q λ,γ 1, γ 2,... γ l (z) and G m,n,q λ,γ 1, γ 2,... γ l (z) for newly defined classes R(δ, q), C(δ, q), RA(β, µ, q), and CA(β, µ, q).We examined Theorems 7 and 8 by presenting the best dominants for certain differential subordinations.The results of this article are the generalizations discussed earlier in in [44].
Many new subclasses of analytic, meromorphic, and p-valent functions can be defined by utilizing the differential and integral operators introduced in this article, and a number of useful properties can be investigated for these classes.
Differential operators have allowed us to study differential equations from the perspective of operator theory and functional analysis.The use of differential operators allows for the solution of differential equations.In the future, research might be conducted to determine whether PDEs can be solved using these operators.These novel operators may be studied for potential applications in the applied sciences and other practical sciences, where similar results have been reported for numerous differential operators.
z), z ∈ U, where the best dominant function is h.