Abstract
This paper’s main goal is to introduce left and right exponential trigonometric convex interval-valued mappings and to go over some of their important characteristics. Additionally, we demonstrate the Hermite–Hadamard inequality for interval-valued functions by utilizing fractional integrals with exponential kernels. Moreover, we use the idea of left and right exponential trigonometric convex interval-valued mappings to show various findings for midpoint- and Pachpatte-type inequalities. Additionally, we show that the results provided in this paper are expansions of several of the results already demonstrated in prior publications The suggested research generates variants that are applicable for conducting in-depth analyses of fractal theory, optimization, and research challenges in several practical domains, such as computer science, quantum mechanics, and quantum physics.
1. Introduction
It is common knowledge that mathematical subjects such as mathematical economy, probability theory, optimal control theory, and others depend heavily on convex function and convexity. Classical convexity has been expanded and generalized over time to include harmonic convexity, h-convexity, and p-convexity, among others. In reality, inequality is the basis for the ideas of convexity and convex function, and its significance cannot be overstated. One of the most significant classical inequalities, the Hermite–Hadamard (HH) inequality below, has recently received a lot of attention.
For a convex mapping on an interval , the HH inequality is written as:
For all with being a convex set. If is concave, then (1) is reversed.
The following inequality as the weighted generalization of (1) was established by Fejér in []. This important generalization of the HH inequality is known as the HH–Fejér inequality.
Let us consider a convex mapping on a convex set , and . Then, we have
If , then we obtain (1) from (2). For a concave mapping, (2) is reversed. Different inequalities can be derived using distinct symmetric convex mappings, .
Integral inequality (1) and (2) in various variants have also been extensively examined in [,,,,,,,,] due to the differences between the ideas of convexity. In order to further their study and take advantage of the growing significance of fractional integrals, numerous writers have combined fractional integrals and Hermite–Hadamard-type inequalities. Recent advances in this field in different areas of mathematics can easily be seen and we refer readers to references [,,,,,,,,,,,].
Some fractional Hermite–Hadamard-type inequalities have been discovered in this way; for more information, see references [,,,,,,,,,]. This field of inequalities has many applications. Similarly, various other types of inequalities have found the bounds of mean inequalities. For more information, see also [,,,,,,,,,,].
On the other hand, Moore initially presented interval analysis as a key method to manage interval uncertainty []. This has a wide range of applications [,,,,,,,,,]. Recently, Khan et al. also contributed to this field and defined different types of inequalities using crip theory and fuzzy theory, see [,,,].
In particular, researchers such as Chalco-Cano et al. [,], Costa and Román-Flores [], Zhao et al. [,], An et al. [], and others have studied a number of classical inequalities with interval-valued functions. Budak et al. [] demonstrated the fractional Hermite–Hadamard inequality for the interval convex function as an additional extension. Since then, the authors of [,,,,,,,,,,] have extensively investigated various additional improvements to and expansions of Hermite–Hadamard inequalities for different convex fuzzy-valued functions. Additionally, in [], some Hermite–Hadamard- and Jensen-type inequalities for up and down convex fuzzy-number-valued functions were discovered. In this study, several Hermite–Hadamard-type inequalities for interval-valued left and right exponential trigonometric functions are established. The earlier inequalities described in [,,,,,,,,,,,,,,,] are generalized by our findings. For more information, see [,,,,,].
We establish some additional modifications for interval fractional Hermite–Hadamard-type inequalities as a result of [,,,]. Our findings clarify some previous questions. Furthermore, it is possible that the findings will be acknowledged as important approaches to investigating the study of interval-valued differential equations, interval optimization, and interval vector spaces, among other things. In Section 2, we provide an introduction. The idea of left and right exponential trigonometric I-V∙M is introduced in Section 3 along with several intervals fractional Hermite–Hadamard-type inequalities that are proven. Finally, several examples are provided in Section 4.
2. Preliminaries
Let be the space of all closed and bounded intervals of and defined by
If , then is said to be degenerate. In this article, all intervals will be non-degenerate intervals. If , then is called a positive interval. The set of all positive intervals is denoted by and defined as
Let and be defined by
Then, the Minkowski difference , addition and for are defined by
Remark 1.
For given we say that if and only if is a partial interval order relation [].
For the Hausdorff–Pompeiu distance between intervals and is defined by
It is a familiar fact that is a complete metric space, see [,,].
3. Fractional Integral Operators of Real- and Interval-Valued Mappings
Now, we define and discuss some properties of fractional integral operators of real- and interval-valued mappings.
Theorem 1.
If is an interval-valued mapping (I∙V∙M) satisfying that , then is Aumann integrable (IA-integrable) over when and only when and are both integrable over
such that [,]
Definition 1.
Let
and be the collection of all Lebesgue-measurable mapping on . Then, the left and right Riemann–Liouville fractional integral with exponential kernels in connection of with order are, respectively, defined by []:
and
Definition 2.
Let and
be the collection of all Lebesgue-measurable interval-valued mapping on . Then, the left and right Riemann–Liouville fractional integral with exponential kernels in connection of with order are, respectively, defined by []
and
Definition 3.
The mapping is called exponential trigonometric convex mapping on if []
For all and If (14) is reversed, then is called exponential trigonometric concave mapping on .
4. Left and Right Exponential Trigonometric Convex Interval-Valued Functions
In following results, we will use left and right Riemann–Liouville fractional integrals with left and right exponential kernels, and some nontrivial examples are also given to prove the validity of these integrals and results.
Definition 4.
The I-V∙M is called a left and right exponential trigonometric convex I-V∙M on if
For all where for all If (15) is reversed, then is called a left and right exponential trigonometric concave I-V∙M on .
Theorem 2.
Let be an invex set and be a F-N-V∙M given by
For all . Then is a left and right exponential trigonometric convex F-N-V∙M on if and only if and are both exponential trigonometric convex mappings.
Proof.
Consider that and are both exponential trigonometric convex and concave mappings on , respectively. Then, from (14), we have
and
Then, by (16), (8), and (10), we obtain
that is
Hence, is a left and right exponential trigonometric convex F-N-V∙M on .
Conversely, let be a left and right exponential trigonometric convex F-N-V∙M on Then, for all and we have
Therefore, from (16), we have
Again, from (16), (6), and (8), we obtain
For all and Then, by left and right exponential trigonometric convexity of , we have for all and such that
and
Hence, the result follows.□
Remark 2.
If , then we obtain the classical definition of exponential trigonometric convex mappings, see [].
We obtained some new definitions from the literature which will be helpful in investigating some classical and new results as special cases of the main results.
Definition 5.
Let be an I-V∙M. Then, is given by
For all . Then, is a lower left and right exponential trigonometric convex (concave) I-V∙M on if and only if
and
Definition 6.
Suppose that is an I-V∙M that is defined by
For all Then, is an upper left and right exponential trigonometric convex (concave) I-V∙M on if and only if
and
5. Riemann–Liouville Fractional Integrals Hermite–Hadamard-Type Inequalities
In the following section, we use the new concept of left and right exponential trigonometric convex interval-valued mapping to illustrate a few Riemann–Liouville fractional integrals Hermite–Hadamard-type inequalities having exponential kernels.
Theorem 3.
Let be an I-V∙M on given by for all . If is a left and right exponential trigonometric convex I-V∙M on and , then
If
is a left and right exponential trigonometric concave I-V∙M, then
where
Proof.
Let be a left and right exponential trigonometric convex I-V∙M. Then, by hypothesis, we have
After simplification, we find that
Therefore, we have
Taking and multiplying both sides by and integrating the obtained result with respect to from to , we have
Let and Then, we have
Now, taking the right side of Equation (19), we have
From (19) and (20), we have
Similarly, for , we have
From (21) and (22), we have
That is
For the right side of Equation (17), since is a left and right exponential trigonometric convex I-V∙M, we can deduce that
and
Adding (24) and (25), we have
Since is I-V∙M, then we have
Taking from (27) and multiplying the inequality with , and integrating the resultant with from to , we have
In a similar way to the above, for we have
From (28) and (29), we have
From (37) and (30), we have
Hence, the required result. □
If we consider some mild restrictions on Theorem 3, then the following new and classical outcomes can be obtained.
Remark 3.
From Theorem 3, we can clearly see the following.
If one lays which is an upper left and right exponential trigonometric concave I-V∙M on then one acquires the following inequality []:
If , then
Now from Theorem 3, we acquire the following result, which is also a new one:
If one lays and which is an upper left and right exponential trigonometric concave I-V∙M on then one can acquire the following inequality []:
Let and . Then, from Theorem 3, we achieve the Hermite–Hadamard inequality for the interval-valued left and right exponential trigonometric convex mapping, which is also a new one:
If then, from Theorem 3, we arrive at classical fractional Hermite–Hadamard inequality for the exponential trigonometric convex mapping.
Let and . Then, from Theorem 3, we achieve the classical Hermite–Hadamard inequality for the exponential trigonometric convex mapping, see [].
Example 1.
Let , and the I-V∙M defined by . Since left and right end point mappings are exponential trigonometric convex mappings, then is a left and right exponential trigonometric convex I-V∙M. We can clearly see that and
Note that
Therefore,
and Theorem 3 is verified.
The fractional integrals with exponential kernels can be used to describe Hermite–Hadamard-type inclusions involving midpoint as follows:
Theorem 4.
Let be an I-V∙M on given by for all . If is a left and right exponential trigonometric convex I-V∙M on and , then
If is a left and right exponential trigonometric concave I-V∙M, then
where
, , and .
Proof.
Let be a left and right exponential trigonometric convex I-V∙M. Then, by hypothesis, we have
After simplification, we find that
Therefore, we have
Taking and multiplying both sides by and integrating the obtained result with respect to from to , we have
Let and Then, we have
Now, taking the right side of Equation (39), we have
From (39) and (40), we have
Similarly, for , we have
From (41) and (42), we have
That is
For the right side of Equation (37), since is a left and right exponential trigonometric convex I-V∙M, we can deduce that
and
Adding (44) and (45), we have
Since is I-V∙M, then we have
Taking from (47) and multiplying the inequality by , and integrating the resultant with from to , we have
In a similar way as above, for we have
From (48) and (49), we have
From (43) and (50), we have
Hence, the required result. □
Remark 4.
From Theorem 4, we can clearly see the following.
If one lays which is an upper left and right exponential trigonometric concave I-V∙M on then one acquires the following inequality []:
If
, that is
Then, we acquire the following result, which is also a new one:
If one lays and which is an upper left and right exponential trigonometric concave I-V∙M on then one acquires the following inequality []:
Let and
. Then, from Theorem 4, we achieve the Hermite–Hadamard inequality for interval-valued
left and right exponential trigonometric convex mapping, which is also a new one:
If
then, from Theorem 4, we arrive at classical fractional Hermite–Hadamard inequality for
exponential trigonometric convex mapping.
Let and . Then, from Theorem 4, we achieve the classical Hermite–Hadamard inequality for exponential trigonometric convex mapping, see [].
Finally, we present the Pachpatte-type fractional integral inclusions. Moreover, in Theorem 5 we will establish a fractional integral inclusion, and discuss the several inclusions via a left and right exponential trigonometric convex I-V∙M.
Theorem 5.
Let be two I-V∙Ms on defined by and for all . If and are two left and right exponential trigonometric convex I-V∙Ms on and , then
If and are left and right exponential trigonometric concave I-V∙Ms, then
where , , , and
Proof.
Since are both left and right exponential trigonometric convex I-V∙Ms, taking left end points mappings, we have
and
From the definition of left and right exponential trigonometric convex I-V∙Ms, it follows that and , so
Analogously, we have
Adding (59) and (60), we have
Multiplying (61) by and integrating the obtained result with respect to over (0,1), we have
It follows that
Similarly, for , we have
where
and
From (62) and (63), we have
That is
and the theorem has been established. □
Remark 5.
From Theorem 5 we can clearly see the following.
If one lays which is an upper left and right exponential trigonometric concave I-V∙M on then one acquires the following inequality []:
If , that is
Then, we acquire the following result, which is also a new one:
If one lays and which is an upper left and right exponential trigonometric concave I-V∙M on then one acquires the following inequality []:
Let and
. Then, from Theorem 5, we achieve the Hermite–Hadamard inequality for interval-valued
left and right exponential trigonometric convex mapping, which is also a new one:
If
, then, from Theorem 5, we arrive at the classical fractional Hermite–Hadamard inequality for exponential trigonometric convex mapping:
Let and . Then, from Theorem 5, we achieve the classical Hermite–Hadamard inequality for exponential trigonometric convex mapping, see [].
Example 2.
Let , , and Since left and right end point mappings , and are exponential trigonometric convex mappings, then and are both exponential trigonometric convex I-V∙Ms. We can clearly see that and
Note that
Therefore, we have
It follows that
and Theorem 5 has been demonstrated.
Theorem 6.
Let be two I-V∙Ms on defined by and for all . If and are two left and right exponential trigonometric convex I-V∙Ms on and , then
If and
are left and right exponential trigonometric concave I-V∙Ms, then
where , , , and
Proof.
Consider are left and right exponential trigonometric convex I-V∙Ms. Then, by hypothesis, we have
Multiplying (72) by and integrating over we find
Similarly, for , we have
From (73) and (74), we have
where
Hence, the required result. □
Remark 6.
From Theorem 6 we can clearly see the following.
If one lays and which are upper left and right exponential trigonometric concave I-V∙Ms on then one acquires the following inequality []:
If
, that is
Then, we acquire the following result, which is also a new one:
If one lays and and which are upper left and right exponential trigonometric concave I-V∙Ms on then one acquires the following inequality []:
Let , and
. Then, from Theorem 6 we achieve the Hermite–Hadamard inequality for interval-valued
left and right exponential trigonometric convex mapping, which is also a new one:
If and
, then, from Theorem 6, we achieve the classical fractional Hermite–Hadamard inequality for
exponential trigonometric convex mapping
Let , and . Then, from Theorem 6, we achieve the classical Hermite–Hadamard inequality for exponential trigonometric convex mapping, see []
Theorem 7.
Let be an I-V∙M on given by for all . If is a left and right exponential trigonometric convex I-V∙M on and , then
If
is a left and right exponential trigonometric concave I-V∙M, then
where
Proof.
Taking we deduce that
After simplification, we find that
Therefore, we have
Taking and multiplying both sides by and integrating the obtained result with respect to from to , we have
Let and Then, we have
Now, taking the right side of Equation (83), we have
From (83) and (84), we deduce that
Similarly, for , from (85), we have
From (85) and (86), we deduce that
For the right side of Equation (81), since is a left and right exponential trigonometric convex I-V∙M, then we can deduce that
and
Adding (88) and (89), we have
Since is I-V∙M, then we have
Taking from (91) and multiplying the inequality by , and integrating the resultant with from to , we have
In a similar way to the above, for we have
From (92) and (93), we have
Combining (87) and (94), we have
where
Similarly, if we take the interval then, from (38), we find that
Adding (95) and (96), we have
To achieve the first and fourth order relations in (81), again by taking
and
By using the inclusion relation (98) and (99), we obtain the first and fourth inclusions of (81). By combining the resultant inclusion and (97), we obtain the following relation:
Hence, the required result. □
Remark 7.
From Theorem 7 we can clearly see the following.
If one lays which is an upper left and right exponential trigonometric concave I-V∙M on then one acquires the following inequality []:
If , that is
Then, we acquire the following result, which is also a new one:
If one lays and which is an upper left and right exponential trigonometric concave I-V∙M on then one acquires the following inequality []:
Let and
. Then, from Theorem 7, we achieve the Hermite–Hadamard inequality for interval-valued
left and right exponential trigonometric convex mapping, which is also a new one:
If , then, from Theorem 7, we arrive at the classical fractional Hermite–Hadamard inequality for
exponential trigonometric convex mapping:
Let and . Then, from Theorem 7, we arrive at the classical Hermite–Hadamard inequality for exponential trigonometric convex mapping, see [].
To validate Theorem 7, we provide the following nontrivial example:
Example 3.
Let , and the I-V∙M defined by
Since left and right end point mappings , are exponential trigonometric convex mappings then is an exponential trigonometric convex I-V∙M. We can clearly see that and
That is
Hence, Theorem 7 is verified.
6. Conclusions
This study discusses some fundamental properties and introduces the concepts of left and right exponential trigonometric interval-valued convex mappings. Furthermore, by utilizing the idea of fractional integrals having exponential kernels, we established some novel Hermite–Hadamard-type inequalities and proved certain conclusions for midpoint- and Pachpatte-type inequalities. Further research is necessary in this important area of interval-valued analysis that includes fractional integral operators. By utilizing the -integral, we plan to investigate the integral inequalities of fuzzy-interval-valued functions and some applications in interval optimizations.
Author Contributions
Conceptualization, M.B.K.; methodology, M.B.K.; validation, M.S.S. and A.C.; formal analysis, M.S.S.; investigation, M.B.K. and A.C.; resources, M.S.S. and A.C.; data curation, A.C.; writing—original draft preparation, M.B.K.; writing—review and editing, M.B.K., A.C. and M.S.S.; visualization, M.B.K.; supervision, M.B.K. and N.A.; project administration, M.B.K., A.C. and N.A. All authors have read and agreed to the published version of the manuscript.
Funding
The research was funded by the University of Oradea, Romania. The researchers also would like to acknowledge the Deanship of Scientific Research, Taif University, Saudi Arabia for funding this work.
Data Availability Statement
Not applicable.
Acknowledgments
The authors would like to thank the Rector, COMSATS University Islamabad, Islamabad 44000, Pakistan. The research was funded by the University of Oradea, Romania. The researchers also would like to acknowledge the Deanship of Scientific Research, Taif University, Saudi Arabia for funding this work.
Conflicts of Interest
The authors declare no conflict of interest.
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