RT Journal Article T1 Existence of Periodic Solution for a Nonlinear Fractional Differential Equation A1 Belmekki, Mohammed A1 Nieto Roig, Juan José A1 Rodríguez López, Rosana K1 Periodic Boundary K1 Fractional Derivative K1 Fractional Calculus K1 Fractional Differential Equation K1 Differential Calculus AB We 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. PB SpringerOpen SN 1687-2762 YR 2009 FD 2009 LK http://hdl.handle.net/10347/22853 UL http://hdl.handle.net/10347/22853 LA eng NO Belmekki, 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/10.1155/2009/324561 NO The research of J. J. Nieto and R. Rodríguez-López has been partially supported by Ministerio de Educacion y Ciencia and FEDER, project MTM2007-61724, and by Xunta de Galicia and FEDER, project PGIDIT06PXIB207023PR DS Minerva RD 28 abr 2026