Department of Mathematics, Shandong University of Science and Technology, Qingdao 266510, China
Copyright © 2011 Yujun Cui. This is an open access article distributed under the
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By applying a fixed point theorem for mappings that are decreasing with respect to a cone, this paper investigates the existence of positive solutions for the nonlinear fractional boundary value problem: , , , where , is the Riemann-Liouville fractional derivative.