Abstract
Fractional operators are one of the frequently used tools to obtain new generalizations of clasical inequalities in recent years and many new fractional operators are defined in the literature. This development in the field of fractional analysis has led to a new orientation in various branches of mathematics and in many of the applied sciences. Thanks to this orientation, it has brought a whole new dimension to the field of inequality theory as well as many other disciplines. In this study, a new lemma has been proved for the fractional integral operator defined by Atangana and Baleanu. Later with the help of this lemma and known inequalities such as Young, Jensen, Hölder, new generalizations of Hermite-Hadamard inequality are obtained. Many reduced corollaries about the main findings are presented for classical integrals.
1. Introduction
First of all, let us recall the concept of convex function which is the basic concept of convex analysis.
Definition 1.
The function , is said to be convex if the following inequality holds
for all and . We say that κ is concave if is convex.
There are many inequalities in the literature for convex functions. But among these inequalities the most take attention of researchers is the Hermite-Hadamard inequality on which hundreds of studies have been conducted. The clasical Hermite-Hadamard integral inequalities are as the following.
Theorem 1.
Assume that is a convex mapping defined on the interval I of where The following statement;
holds and known as Hermite-Hadamard inequality. Both inequalities hold in the reversed direction if κ is concave.
Several new results have been proved related different kinds of convex functions and associated integral inequalities. In [1], Bakula et al. gave some new integral inequalities of Hadamard type for m-convex and -convex functions. A similar paper has been written by Kirmaci et al. for s-convex functions in [2]. Besides, in [3], Kavurmaci et al. proved some new inequalities for convex functions. In [4], the authors have given several new results for co-ordinated convexity which is a modification of convexity on the co-ordinates. In [5], Özdemir et al. have defined a generalization of convexity and proved some Hadamard type inequalities. On all of these, in [6], Sarikaya et al. gave a different perspective to the inequality (2) by using the Riemann-Liouville fractional integral operators as follows:
Theorem 2
([6]). Let be a positive function with and . If κ is a convex function on , then the following inequalities for fractional integrals hold:
with .
In here, and are respectly right and left side of Riemann-Liouville fractional integral operators, as follows:
Definition 2.
Let . The Riemann-Liouville fractional integrals and of order with are defined by
and
respectively, where is the Gamma function defined by and .
This study played a key role in generalizing, expanding and obtaining variations of classical integral inequalities with the help of fractional integrals. On the other hand, by defining different versions of Riemann-Liouville fractional integral operators in the last decade, new versions and generalizations of inequalities on both convex functions and differentiable functions have been obtained (see the paper [7]). Studies in the field of fractional analysis have brought a new perspective and orientation to many fields of applied sciences and mathematics in addition to the theory of inequality in recent years. It has shed light on many real world problems with the applications of newly defined fractional integral and derivative operators. In these new operators, several important criteria have differentiated them and have made some advantageous in applications compared to others. Exponentially or power law expressions used in the kernel of fractional operators revealed their features such as locality and singularity, and it became important to obtain the initial conditions for the special versions of the parameters used in the definition. Another important detail is to reveal the spaces where the operators are defined and to show the suitability for the real world problems. In [8], Atangana and Baleanu has offered a non-singular and non-local fractional derivative and proved properties of this interesting operator. Due to this new definition, many real world problems has been solved again with time memory effect. In [9], the authors have given right sided Atangana-Baleanu integral operators and proved some new results that depend to this non-singular operator. In [10], Awan et al. have established Hadamard type inequalities for preinvex functions via conformable fractional integral operators. In [11], further motivated results have been performed by using fractional integrals. Similarly, Tariboon et al. have proved inequalities via Riemann-Liouville fractional integrals in [12]. The readers can find collection of the fractional derivative and integral operators in [13] and also we refer to the interested readers the following papers [14,15,16,17,18,19,20,21,22]. In this sense, let’s examine some fractional derivative and integral operators with many applications and features. We first start with the Atangana-Baleanu derivative operator as following.
Definition 3
([8]). Let , , then, the definition of the new fractional derivative is given:
Here can be defined as .
Definition 4
([8]). Let , , then, the definition of the new fractional derivative is given:
Equations (3) and (4) have a non-local kernel. Also in Equation (4) when the function is constant we get zero.
With the help of Laplace transform and convolution theorem, Atangana-Baleanu described the fractional integral operator as follows.
Definition 5
([8]). The fractional integral associate to the new fractional derivative with non-local kernel of a function as defined:
where
In [9], Abdeljawad and Baleanu introduced right hand side of integral operator as following; The right fractional new integral with ML kernel of order is defined by
The main purpose of this article is to obtain an integral identity that includes the Atangana-Baleanu integral operator and to prove Hermite-Hadamard type integral inequalities for differentiable convex functions with the help of this identity. The main motivation point of the study is to prove a new integral identity with the potential to produce Hermite-Hadamard type inequalities for Atangana-Baleanu fractional integral operators based on a non-singular and non-local derivative operator. It is aimed to bring more general and effective results to the inequality theory thanks to the kernel structure and properties of the operator.
2. Main Results
Let be differentiable function on with . Throughout this section we will take
We will start with a new integral identity that will be used the proofs of our main findings as following:
Lemma 1.
be differentiable function on with . Then we have the following identity for Atangana-Baleanu fractional integral operators
where , is the normalization function and is Gamma function.
Proof.
By using integration by parts for the right hand side of equation, we have
Then we can write following identity
Similarly, we have following identities.
and
Corollary 1.
In Lemma 1, if we take , then the identity (5) reduces to the identity
Theorem 3.
be differentiable function on with and . If is a convex function, we have the following inequality for Atangana-Baleanu fractional integral operators
where , , is normalization function.
Proof.
By using the identity that is given in Lemma 1, we can write
By using convexity of , we get
and the proof is completed. □
Corollary 2.
In Theorem 3, if we take , then the inequality (10) reduces to the inequality
Theorem 4.
be differentiable function on with and . If is a convex function, we have the following inequality for Atangana-Baleanu fractional integral operators
where , , , , is normalization function.
Proof.
By Lemma 1, we can write
By appliying Hölder inequality, we have
By using convexity of , we have
So, the proof is completed. □
Corollary 3.
In Theorem 4, if we take , then the inequality (11) reduces to the inequality
Theorem 5.
be differentiable function on with and . If is a convex function, we have the following inequality for Atangana-Baleanu fractional integral operators
where , , , , is normalization function.
Proof.
By Lemma 1, we can write
By appliying Young inequality as , we have
By using convexity of and by a simple computation, we have the desired result. □
Corollary 4.
In Theorem 5, if we take , then the inequality (12) reduces to the inequality
Theorem 6.
be differentiable function on with and . If is a convex function, we have the following inequality for Atangana-Baleanu fractional integral operators
where , , , is normalization function.
Proof.
By Lemma 1, we can write
By using power mean inequality, we have
By using convexity of and by a simple computation, we have the desired result. □
Corollary 5.
In Theorem 6, if we take , then the inequality (13) reduces to the inequality
Theorem 7.
be differentiable function on with and . If is a concave function for , then we have
where , , is normalization function.
Proof.
From Lemma 1 and the Jensen integral inequality, we have
By computing the above integrals, we have desired result. □
Corollary 6.
In Theorem 7, if we take , then the inequality (13) reduces to the inequality
Theorem 8.
be differentiable function on with and . If is a concave function, we have
where , , , , is normalization function.
Proof.
By using Lemma 1 and Hölder integral inequality, we can write
By using concavity of and Jensen integral inequality, we get
Similarly
and
So we obtain,
and the proof is completed. □
Corollary 7.
In Theorem 8, if we take , then the inequality (14) reduces to the inequality
3. Conclusions
In the introduction part, a historical background in the field of inequality theory and fractional analysis is presented, and in the main results part, a new integral equation is produced based on fractional integral operators. Then, new Hermite-Hadamard type inequalities are obtained by using various auxiliary inequalities for functions whose absolute values of derivatives are convex and concave. In the main findings, it is emphasized that the results obtained are general versions of classical integral inequalities, considering the particular case of the parameter such as . The special cases of the main theorms can be applied to numerical integration to give new approaches for error estimation of the mid-point and trapezoidal formula.
Author Contributions
A.O.A., T.A.: Conceptualization, Methodology, Software. T.A. and E.S.: Data curation, Writing—Original draft preparation. A.O.A. and A.K.: Visualization, Investigation. T.A.: Supervision. W.S., A.O.A. and E.S.: Writing—Reviewing and Editing. All authors have read and agreed to the published version of the manuscript.
Funding
The authors would like to thank Prince Sultan University for paying the article processing charges.
Institutional Review Board Statement
Not applicable.
Informed Consent Statement
Not applicable.
Data Availability Statement
No data were used to support this study.
Acknowledgments
The authors T. Abdeljawad and W. Shatanawi would like to thank Prince Sultan University through the research TAS research lab.
Conflicts of Interest
The authors declare no conflict of interest.
References
- Klaričić Bakula, M.; Özdemir, M.E.; Pečarić, J. Hadamard type Inequalities for m-convex and (α,m)-Convex Functions. J. Inequalities Pure Appl. Math. 2008, 9, 12. [Google Scholar]
- Kirmaci, U.S.; Klaričić Bakula, M.; Özdemir, M.E.; Pečarić, J. Hadamard-type inequalities of s-convex functions. Appl. Math. Comput. 2007, 193, 26–35. [Google Scholar] [CrossRef]
- Kavurmaci, H.; Avci, M.; Özdemir, M.E. New inequalities of Hermite-Hadamard type for convex functions with applications. J. Inequalities Appl. 2011, 2011, 86. [Google Scholar] [CrossRef] [Green Version]
- Ozdemir, M.E.; Latif, M.A.; Akdemir, A.O. On Some Hadamard-Type Inequalities for Product of Two Convex Functions on the Co-ordinates. Turk. J. Sci. 2016, I, 41–58. [Google Scholar] [CrossRef] [Green Version]
- Özdemir, M.E.; Gürbüz, M.; Kavurmacı, H. Hermite- Hadamard type inequalities for (g,φα)-convex dominated functions. J. Inequalities Appl. 2013, 2013, 184. [Google Scholar] [CrossRef] [Green Version]
- Sarikaya, M.Z.; Set, E.; Yaldiz, H.; Basak, N. Hermite-Hadamard’s inequalities for fractional integrals and related fractional inequalities. Math. Comput. Model. 2013, 57, 2403–2407. [Google Scholar] [CrossRef]
- Set, E. New inequalities of Ostrowski type for mappings whose derivatives are s-convex in the second sense via fractional integrals. Comput. Math. Appl. 2012, 63, 1147–1154. [Google Scholar] [CrossRef] [Green Version]
- Atangana, A.; Baleanu, D. New fractional derivatices with non-local and non-singular kernel. Theory Appl. Heat Transf. Model Therm. Sci. 2016, 20, 763–769. [Google Scholar]
- Abdeljawad, T.; Baleanu, D. Integration by parts and its applications of a new nonlocal fractional derivative with Mittag-Leffler nonsingular kernel. J. Nonlinear Sci. Appl. 2017, 10, 1098–1107. [Google Scholar] [CrossRef] [Green Version]
- Awan, M.U.; Noor, M.A.; Mihai, M.V.; Noor, K.I. Conformable fractional Hermite-Hadamard inequalities via preinvex functions. Tbilisi Math. J. 2017, 10, 129–141. [Google Scholar] [CrossRef]
- Dahmani, Z. On Minkowski and Hermite-Hadamard integral inequalities via fractional integration. Ann. Funct. Anal. 2010, 1, 51–58. [Google Scholar] [CrossRef]
- Tariboon, J.; Ntouyas, S.K.; Sudsutad, W. Some New Riemann-Liouville Fractional Integral Inequalities. Int. J. Math. Math. Sci. 2014, 6, 869434. [Google Scholar] [CrossRef] [Green Version]
- Samko, S.G. Fractional Integral and Derivatives, Theory and Applications, Gordon and Breach, Yverdon et Alibi; Gordon and Breach Science Publisher: Langhorne, PA, USA, 1993. [Google Scholar]
- Zhang, X.; Chen, Y.Q. Admissibility and robust stabilization of continuous linear singular fractional order systems with the fractional order α: The 0 < α < 1 case. ISA Trans. 2018, 82, 42–50. [Google Scholar]
- Zhang, J.-X.; Yang, G.-H. Fault-tolerant output-constrained control of unknown Euler-Lagrange systems with prescribed tracking accuracy. Automatica 2020, 111, 108606. [Google Scholar] [CrossRef]
- Vinales, A.D.; Desposito, M.A. Anomalous diffusion induced by a Mittag-Leffler correlated noise. Phys. Rev. E 2007, 75, 042102. [Google Scholar] [CrossRef] [PubMed] [Green Version]
- Sandev, T.; Tomovski, Z. Asymptotic behavior of a harmonic oscillator driven by a generalized Mittag-Leffler noise. Phys. Scr. 2010, 82, 065001. [Google Scholar] [CrossRef]
- Set, E.; Akdemir, A.O.; Özata, F. Grüss Type Inequalities for Fractional Integral Operator Involving the Extended Generalized Mittag Leffler Function. Appl. Comput. Math. 2020, 19, 402–414. [Google Scholar]
- Özdemir, M.E.; Ekinci, A.; Akdemir, A.O. Some new integral inequalities for functions whose derivatives of absolute values are convex and concave. TWMS J. Pure Appl. Math. 2019, 2, 212–224. [Google Scholar]
- Ekinci, A.; Özdemir, M.E. Some New Integral Inequalities Via Riemann Liouville Integral Operators. Appl. Comput. Math. 2019, 3, 288–295. [Google Scholar]
- Aliev, F.A.; Aliev, N.A.; Safarova, N.A. Transformation of the Mittag-Leffler function to an exponential function and some of its applications to problems with a fractional derivative. Appl. Comput. Math. 2019, 18, 316–325. [Google Scholar]
- Vinales, A.D.; Paissan, G.H. Velocity autocorrelation of a free particle driven by a Mittag-Leffler noise: Fractional dynamics and temporal behaviors. Phys. Rev. E 2014, 90, 062103. [Google Scholar] [CrossRef] [PubMed]
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