%0 Journal Article
%T Recent Existence Results for Second-Order Singular Periodic Differential Equations
%A Chu Jifeng
%A Nieto JuanJ
%J Boundary Value Problems
%D 2009
%I Springer
%X We present some recent existence results for second-order singular periodic differential equations. A nonlinear alternative principle of Leray-Schauder type, a well-known fixed point theorem in cones, and Schauder's fixed point theorem are used in the proof. The results shed some light on the differences between a strong singularity and a weak singularity.
%U http://www.boundaryvalueproblems.com/content/2009/540863