© Claudio Cuevas et al. 2011
Received: 23 September 2010
Accepted: 8 December 2010
Published: 14 December 2010
-asymptotically -periodic functions have applications to several problems, for example in the theory of functional differential equations, fractional differential equations, integral equations and partial differential equations. The concept of -asymptotic -periodicity was introduced in the literature by Henríquez et al. [1, 2]. Since then, it attracted the attention of many researchers (see [1–10]). In Pierri  a new -asymptotically -periodic space was introduced. It is called the space of weighted -asymptotically -periodic (or -asymptotically -periodic) functions. In particular, the author has established conditions under which a -asymptotically -periodic function is asymptotically -periodic and also discusses the existence of -asymptotically -periodic solutions for an integral abstract Cauchy problem. The author has applied the results to partial integrodifferential equations.
where , is a linear densely defined operator of sectorial type on a complex Banach space and is an appropriate function. Note that the convolution integral in (1.1) is known as the Riemann-Liouville fractional integral . We remark that there is much interest in developing theoretical analysis and numerical methods for fractional integrodifferential equations because they have recently proved to be valuable in various fields of sciences and engineering. For details, including some applications and recent results, see the monographs of Ahn and MacVinish , Gorenflo and Mainardi  and Trujillo et al. [14–16] and the papers of Agarwal et al. [17–23], Cuesta [11, 24], Cuevas et al. [5, 6], dos Santos and Cuevas , Eidelman and Kochubei , Lakshmikantham et al. [27–30], Mophou and N'Guérékata , Ahmed and Nieto , and N'Guérékata . In particular equations of type (1.1) are attracting increasing interest (cf. [5, 11, 24, 34]).
The existence of weighted -asymptotically -periodic (mild) solutions for integrodifferential equation of fractional order of type (1.1) remains an untreated topic in the literature. Anticipating a wide interest in the subject, this paper contributes in filling this important gap. In particular, to illustrate our main results, we examine sufficient conditions for the existence and uniqueness of a weighted -asymptotically -periodic mild solution to a fractional oscillation equation.
2. Preliminaries and Basic Results
In this section, we introduce notations, definitions and preliminary facts which are used throughout this paper. Let and be Banach spaces. The notation stands for the space of bounded linear operators from into endowed with the uniform operator topology denoted , and we abbreviate to and whenever . In this paper denotes the Banach space consisting of all continuous and bounded functions from into with the norm of the uniform convergence. For a closed linear operator we denote by the resolvent set and by the spectrum of (that is, the complement of in the complex plane). Set the resolvent of for .
2.1. Sectorial Linear Operators and the Solution Operator for Fractional Equations
In order to give an operator theoretical approach for the study of the abstract system we recall the following definition.
Definition 2.1 (see ).
Let be a closed linear operator with domain in a Banach space . One calls the generator of a solution operator for (1.1)-(1.2) if there are and a strongly continuous function such that and , for all . In this case, is called the solution operator generated by . By [35, Proposition 2.6], . We observe that the power function is uniquely defined as , with .
We recall the following definitions.
Definition 2.3 (see ).
Throughout this paper, represents the space formed for all the -valued -asymptotically -periodic functions endowed with the uniform convergence norm denoted . It is clear that is a Banach space (see [1, Proposition 3.5]).
Definition 2.4 (see ).
A function is called uniformly -asymptotically -periodic on bounded sets if for every bounded subset , the set is bounded and , uniformly for . If we say that is uniformly -asymptotically -periodic on bounded sets (see ).
To prove some of our results, we need the following lemma.
which proves the assertion.
which completes the proof.
Definition 3.1 (see ).
Now, we can establish our first existence result.
If , then there exits a unique -asymptotically -periodic mild solution of (1.1)-(1.2). Suppose, there is a function such that and , for every and all . If is such that as , then is weighted -asymptotically -periodic.
which implies that as , and hence . Moreover, from the above estimate it is easy to infer that , for all , is a contraction and there exists a unique -asymptotically -periodic mild solution of (1.1)-(1.2).
C. Cuevas thanks the Department of Mathematics of Universidad de La Frontera, where this project was started. The authors are grateful to the referees for their valuable comments and suggestions. C. Cuevas is partially supported by CNPQ/Brazil under Grant 300365/2008-0.
- Henríquez HR, Pierri M, Táboas P:On -asymptotically -periodic functions on Banach spaces and applications. Journal of Mathematical Analysis and Applications 2008,343(2):1119-1130. 10.1016/j.jmaa.2008.02.023MathSciNetView ArticleMATHGoogle Scholar
- Henríquez HR, Pierri M, Táboas P:Existence of -asymptotically -periodic solutions for abstract neutral equations. Bulletin of the Australian Mathematical Society 2008,78(3):365-382. 10.1017/S0004972708000713MathSciNetView ArticleMATHGoogle Scholar
- Agarwal RP, de Andrade B, Cuevas C: On type of periodicity and ergodicity to a class of integral equations with infinite delay. Journal of Nonlinear and Convex Analysis 2010,11(2):309-333.MathSciNetMATHGoogle Scholar
- Caicedo A, Cuevas C: -asymptotically -periodic solutions of abstract partial neutral integro-differentail equations. Functional Differential Equations 2010,17(1-2):387-405.MathSciNetMATHGoogle Scholar
- Cuevas C, de Souza JC: -asymptotically -periodic solutions of semilinear fractional integro-differential equations. Applied Mathematics Letters 2009,22(6):865-870. 10.1016/j.aml.2008.07.013MathSciNetView ArticleMATHGoogle Scholar
- Cuevas C, César de Souza J:Existence of -asymptotically -periodic solutions for fractional order functional integro-differential equations with infinite delay. Nonlinear Analysis: Theory, Methods & Applications 2010,72(3-4):1683-1689. 10.1016/j.na.2009.09.007View ArticleMathSciNetMATHGoogle Scholar
- Cuevas C, Lizama C: -asymptotically -periodic solutions for semilinear Volterra equations. Mathematical Methods in the Applied Sciences 2010,33(13):1628-1636.MathSciNetMATHGoogle Scholar
- de Andrade B, Cuevas C: -asymptotically -periodic and asymptotically -periodic solutions to semi-linear Cauchy problems with non-dense domain. Nonlinear Analysis: Theory, Methods & Applications 2010,72(6):3190-3208. 10.1016/j.na.2009.12.016MathSciNetView ArticleMATHGoogle Scholar
- Nicola SHJ, Pierri M:A note on -asymptotically periodic functions. Nonlinear Analysis: Real World Applications 2009,10(5):2937-2938. 10.1016/j.nonrwa.2008.09.011MathSciNetView ArticleMATHGoogle Scholar
- Pierri M:On -asymptotically -periodic functions and applications. submittedGoogle Scholar
- Cuesta E: Asymptotic behaviour of the solutions of fractional integro-differential equations and some time discretizations. Discrete and Continuous Dynamical Systems. Series A 2007, 2007: 277-285.MathSciNetMATHGoogle Scholar
- Anh VV, Mcvinish R: Fractional differential equations driven by Lévy noise. Journal of Applied Mathematics and Stochastic Analysis 2003,16(2):97-119. 10.1155/S1048953303000078MathSciNetView ArticleMATHGoogle Scholar
- Gorenflo R, Mainardi F: Fractional calculus: integral and differential equations of fractional order. In Fractals and Fractional Calculus in Continuum Mechanics (Udine, 1996), CISM Courses and Lectures. Volume 378. Edited by: Carpinteri A, Mainardi F. Springer, Vienna, Austria; 1997:223-276.View ArticleGoogle Scholar
- Kilbas AA, Srivastava HM, Trujillo JJ: Theory and Applications of Fractional Differential Equations, North-Holland Mathematics Studies. Volume 204. Elsevier Science B.V., Amsterdam, The Netherlands; 2006:xvi+523.Google Scholar
- Nigmatullin RR, Trujillo JJ: Mesoscopic fractional kinetic equations versus a Riemann-Liouville integral type. In Advances in Fractional Calculus. Springer, Dordrecht, The Netherlands; 2007:155-167.View ArticleGoogle Scholar
- Rivero M, Trujillo JJ, Velasco MP: On deterministic fractional models. In New Trends in Nanotechnology and Fractional Calculus Applications. Springer, New York, NY, USA; 2010:123-150.View ArticleGoogle Scholar
- Agarwal RP, de Andrade B, Cuevas C: Weighted pseudo-almost periodic solutions of a class of semilinear fractional differential equations. Nonlinear Analysis: Real World Applications 2010, 11: 3532-3554. 10.1016/j.nonrwa.2010.01.002MathSciNetView ArticleMATHGoogle Scholar
- Agarwal RP, de Andrade B, Cuevas C: On type of periodicity and ergodicity to a class of fractional order differential equations. Advances in Difference Equations 2010, 2010:-25.Google Scholar
- Agarwal RP, Belmekki M, Benchohra M: A survey on semilinear differential equations and inclusions involving Riemann-Liouville fractional derivative. Advances in Difference Equations 2009, 2009:-47.Google Scholar
- Agarwal RP, Benchohra M, Hamani S: A survey on existence results for boundary value problems of nonlinear fractional differential equations and inclusions. Acta Applicandae Mathematicae 2010,109(3):973-1033. 10.1007/s10440-008-9356-6MathSciNetView ArticleMATHGoogle Scholar
- Agarwal RP, Lakshmikantham V, Nieto JJ: On the concept of solution for fractional differential equations with uncertainty. Nonlinear Analysis: Theory, Methods & Applications 2010,72(6):2859-2862. 10.1016/j.na.2009.11.029MathSciNetView ArticleMATHGoogle Scholar
- Agarwal RP, Zhou Y, He Y: Existence of fractional neutral functional differential equations. Computers & Mathematics with Applications 2010,59(3):1095-1100.MathSciNetView ArticleMATHGoogle Scholar
- Agarwal RP, Cuevas C, Soto H, El-Gebeily M: Asymptotic periodicity for some evolution equations in Banach spaces. Nonlinear Analysis: Theory, Methods & Applications. In pressGoogle Scholar
- Cuesta E, Lubich C, Palencia C: Convolution quadrature time discretization of fractional diffusion-wave equations. Mathematics of Computation 2006,75(254):673-696. 10.1090/S0025-5718-06-01788-1MathSciNetView ArticleMATHGoogle Scholar
- dos Santos JPC, Cuevas C: Asymptotically almost automorphic solutions of abstract fractional integro-differential neutral equations. Applied Mathematics Letters 2010,23(9):960-965. 10.1016/j.aml.2010.04.016MathSciNetView ArticleMATHGoogle Scholar
- Eidelman SD, Kochubei AN: Cauchy problem for fractional diffusion equations. Journal of Differential Equations 2004,199(2):211-255. 10.1016/j.jde.2003.12.002MathSciNetView ArticleMATHGoogle Scholar
- Lakshmikantham V: Theory of fractional functional differential equations. Nonlinear Analysis: Theory, Methods & Applications 2008,69(10):3337-3343. 10.1016/j.na.2007.09.025MathSciNetView ArticleMATHGoogle Scholar
- Lakshmikantham V, Devi JV: Theory of fractional differential equations in a Banach space. European Journal of Pure and Applied Mathematics 2008,1(1):38-45.MathSciNetMATHGoogle Scholar
- Lakshmikantham V, Vatsala AS: Basic theory of fractional differential equations. Nonlinear Analysis: Theory, Methods & Applications 2008,69(8):2677-2682. 10.1016/j.na.2007.08.042MathSciNetView ArticleMATHGoogle Scholar
- Lakshmikantham V, Vatsala AS: Theory of fractional differential inequalities and applications. Communications in Applied Analysis 2007,11(3-4):395-402.MathSciNetMATHGoogle Scholar
- Mophou GM, N'Guérékata GM: Existence of the mild solution for some fractional differential equations with nonlocal conditions. Semigroup Forum 2009,79(2):315-322. 10.1007/s00233-008-9117-xMathSciNetView ArticleMATHGoogle Scholar
- Ahmad B, Nieto JJ: Existence results for nonlinear boundary value problems of fractional integrodifferential equations with integral boundary conditions. Boundary Value Problems 2009, 2009:-11.Google Scholar
- N'Guérékata GM: A Cauchy problem for some fractional abstract differential equation with non local conditions. Nonlinear Analysis: Theory, Methods & Applications 2009,70(5):1873-1876. 10.1016/j.na.2008.02.087MathSciNetView ArticleMATHGoogle Scholar
- Hilfe R (Ed): Applications of Fractional Calculus in Physics. World Scientific, River Edge, NJ, USA; 2000:viii+463.Google Scholar
- Keyantuo V, Lizama C: On a connection between powers of operators and fractional Cauchy problems. submittedGoogle Scholar
This article is published under license to BioMed Central Ltd. 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.