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Research Article | Open Access
Volume 2024 | Article ID 5531984 | https://doi.org/10.1155/2024/5531984
Panjaiyan Karthikeyann,1Sadhasivam Poornima,1Kulandhaivel Karthikeyan,2Chanon Promsakon,3,4and Thanin Sitthiwirattham4,5
Academic Editor: Chang Phang
Received09 Aug 2023
Revised28 Oct 2023
Accepted25 Apr 2024
Published17 May 2024
Abstract
In this paper, we study the existence and uniqueness of solutions for impulsive Atangana-Baleanu-Caputo fractional integro-differential equations with boundary conditions. Schaefer’s fixed point theorem and Banach contraction principle are used to prove the existence and uniqueness results. An example is presented to illustrate the results.
1. Introduction
To analyze the fractional dynamics of the provided model, we use the Atangana–Baleanu fractional operator in the Caputo sense. Because of their nonlocal characteristics, fractional derivatives are used. Many authors studied the fractional derivative with applications, see for example [1–11]. The prime reason is the theory of fractional calculus’s quick development, which is used extensively in many different fields including biology, mathematics, chemistry, physics, mechanics, medicine, environmental science, control theory, image and signal processing, finance, and others, see reference [12–17].
Numerous phenomena encounter abrupt or sudden changes in their state of motion or rest in real-world issues. Impulsive differential equations are used to model these sudden changes. Regarding ordinary derivatives and integrals, the field that deals with the aforementioned issues has a strong foundation. Researchers have employed fixed point theory and nonlinear analysis techniques to find the results of investigations. The authors have investigated the theory of these differential equations, see reference [18–22]. However, the study of impulsive problems using the theory of fractional calculus has also progressed well. A delay differential equation is a differential equation where the time derivatives at the current time depend on the solution and possibly its derivatives at previous times. These models are used, among other things, in the fields of biology, economics, and mechanics, see [23]. The delay in this differential equation comes from the interval between the beginning of cellular production in the bone marrow and the release of mature cells into the blood. These equations were developed to render models more reasonable because many practices depend on historical data, refer [22, 24, 25]. The fact that these models only consider past states and not past rates is one of their drawbacks.
In [26], Benchohra et al. investigated the existence and stability results for the following fractional differential equations:where is the Caputo fractional derivative, , are given functions with , , . , where and represent the right and left limits of at , respectively.
In [6], Gul et al. examined the existence of the following boundary value problems under the fractional derivative:where is the fractional derivative of order , .
In [27], Reunsumrit et al. discussed the existence results for the following problem:where - is the fractional derivative of order , and is a continuous function. Here, , and . , , and and indicates the right and left hand limits of at .
Motivated by the works, consider the impulsive fractional integro-differential equations with boundary conditions of the form:where - is the fractional derivative of order , and is continuous function. Here, . , , and represent the left and right hand limits of at . For any , we represent by
The contents of this paper are organized as follows. Section 2 provides some fundamental definitions and lemmas. The existence and uniqueness of fractional implicit differential equations are studied in Section 3. In Section 4, the applications are illustrated through an example.
2. Preliminaries
Define is a Banach space with the norm is a Banach space with the norm is a Banach space with the norm
Definition 1 (see [27]). Let with , the fractional order derivative is defined aswhere is called normalization function satisfying and is a Mittag–Leffler function.
Definition 2 (see [27]). The fractional integral for is written aswhere is the Riemann–Liouville fractional integral.
Lemma 3 (see [27]). Consider the following problem:Then, the solution is given by
Proof. By using Definition 2, we get
Theorem 4 (see [26]). Let be a Banach space, and is a completely continuous operator. If the set is bounded, then has fixed points.
Lemma 5 (see [26]). Let be a real function and be a nonnegative, locally integrable function on , and suppose there are constants and such that
There exists a constant such that
Lemma 6. Consider the boundary value problem with nonlinear integral boundary conditions if ,then, the solution is given by
Proof. By Lemma 3, we can get the result (18) directly by replacing into the boundary condition.
Lemma 7. Consider the nonlinear integral boundary value problemthen, the solution of the problem (19) is
Proof. Assume satisfies (19).
If ,Lemma 6 impliesIf , then Lemma 6 impliesIf , then Lemma 6 impliesRepeating this process in these ways, the solution , for , where can be written as
3. Main Results
The following hypotheses are needed to prove the main results. (A1) For the constants , we have for any (A2) For constants , we have for any (A3) For the constants , we have for any (A4) For the constants , we have for any (A5) There exists with such that For , and . (A6) There exist constants such that For each , . (A7) is a completely continuous function, and for each bounded set in , the set is equicontinuous in and there exist two constants , with such that, .
Theorem 8. Under hypotheses (A1)–(A4), the considered problem (4) has a unique solution if
Proof. Consider the operator bywhere be such thatIf , If , thenFor any and from (33), we havewhere such thatBy , we haveHence, we obtainTherefore, is a contraction and (4) has a unique solution.
Theorem 9. Assume the hypotheses (A1)–(A7) hold, then problem (4) has at least one solution.
Proof. We consider the operator defined byThe operator defined in (33) can be written asfor each .
We shall use Schaefer’s fixed point theorem to prove that has a fixed point. So, we have to show that is completely continuous. Since is completely continuous by (A7), we shall show that is completely continuous.
Step 10. is continuous. Let the sequence such that in .
If , thenFor , we havewhere such thatBy , we haveSince , then we get as for each .
Let and for each , we have and .
Then, we haveFor each , the functions and are integrable on , and then the Lebesgue Dominated Convergence Theorem and (44) imply thatConsequently, is continuous.
Step 11. maps bounded sets into bounded sets in . Indeed, it is enough to show that for any , there exists a positive constant such that for each , we have .
For each , we havewhere such thatBy and for each , we havewhere and . Then,Thus, (49) impliesAnd if , thenthus
Step 12. maps bounded sets into equicontinuous sets of .
Let be a bounded set of as in Step 11, and let . Then,As , the right hand side of the above inequality tents to 0. Hence, is completely continuous.
Step 13. A priori bounds. To prove that the setis bounded. Let . Then, for some . Thus, for each , we haveAnd for each and by , we haveFor each and by (58), (A6) and (A7), and we haveDefine byThen, there exists such that . If , then by the previous inequality, we have for Applying Lemma 5, we getwhere is a constant. If , then , thus for any , , we getHence, the set is bounded. By Theorem 4, the fixed point of is a solution of problem (4).
4. Example
Consider the following problem:where
As and , let
Thus, we have , and choose .
Now, examine the conditions of the theorems (40) and attain
Therefore, problem (65) has a unique solution.
5. Concluding Remarks
This work has successfully investigated the existence and uniqueness results for the fractional implicit differential equation and integral boundary conditions. These types of problems have numerous applications in mathematical modeling of human diseases and dynamical problems. Based on the Banach fixed point theorem and Schaefer’s fixed point theorem, we have established the adequate results for at least one solution. The derived results have been justified by proving a suitable problem. In future, we extend our work with numerical results [28].
Data Availability
No data were used to support the findings of this study.
Conflicts of Interest
The authors declare that they have no conflicts of interest.
Authors’ Contributions
Panjaiyan Karthikeyann, Sadhasivam Poornima, Kulandhaivel Karthikeyan, Chanon Promsakon, and Thanin Sitthiwirattham contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Panjaiyan Karthikeyann, Kulandhaivel Karthikeyan, Chanon Promsakon, and Thanin Sitthiwirattham. The first draft of the manuscript was written by Sadhasivam Poornima, Chanon Promsakon. All authors commented on previous versions of the manuscript. All the authors read and approved the final manuscript. Panjaiyan Karthikeyann, Sadhasivam Poornima, Kulandhaivel Karthikeyan, Chanon Promsakon, and Thanin Sitthiwirattham confirm that all authors meet the ICMJE criteria.
Acknowledgments
This research was funded by National Science, Research and Innovation Fund (NSRF) and King Mongkut’s University of Technology North Bangkok with contract no. KMUTNB-FF-66-54.
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Copyright
Copyright © 2024 Panjaiyan Karthikeyann et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.