Academic Editor: J. J. Trujillo
Copyright © 2011 Meiqiang Feng 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.
The expression and properties of Green's function for a class of nonlinear fractional
differential equations with integral boundary conditions are studied and employed to obtain
some results on the existence of positive solutions by using fixed point theorem in cones. The
proofs are based on the reduction of the problem considered to the equivalent Fredholm integral
equation of the second kind. The results significantly extend and improve many known results
even for integer-order cases.