NONTRIVIAL SOLUTIONS FOR BOUNDARY-VALUE PROBLEMS OF NONLINEAR FRACTIONAL DIFFERENTIAL EQUATIONS

In this paper, we consider the existence of nontrivial solutions for the nonlinear fractional dierential equation boundary-value problem (BVP) iD fiu(t) = ‚(f(t,u(t)) + q(t)), 0 < t < 1 con- ditions of the existence and uniqueness of nontrivial solution of BVP when ‚ in some interval. Our approach is based on Leray-Schauder nonlinear alternative. Particularly, we do not use the nonnegative assumption and monotonicity which was essential for the technique used in almost all existed literature on f.