Belmekki, MohammedNieto Roig, Juan JoséRodríguez López, Rosana2020-06-062020-06-062009Belmekki, M., Nieto, J. & Rodríguez-López, R. Existence of Periodic Solution for a Nonlinear Fractional Differential Equation. Bound Value Probl 2009, 324561 (2009). https://doi.org/10.1155/2009/3245611687-2762http://hdl.handle.net/10347/22853We study the existence of solutions for a class of fractional differential equations. Due to the singularity of the possible solutions, we introduce a new and proper concept of periodic boundary value conditions. We present Green's function and give some existence results for the linear case and then we study the nonlinear problem.engCopyright © 2009 Mohammed Belmekki 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.http://creativecommons.org/licenses/by/2.0Periodic BoundaryFractional DerivativeFractional CalculusFractional Differential EquationDifferential Calculusjournal article10.1155/2009/3245611687-2770open access