- Research Article
- Open Access
Existence of Positive Solutions of Nonlinear Second-Order Periodic Boundary Value Problems
© Ruyun Ma et al. 2010
Received: 31 August 2010
Accepted: 8 November 2010
Published: 25 November 2010
This paper is devoted to study the existence of periodic solutions of the second-order equation , where is a Carathéodory function, by combining a new expression of Green's function together with Dancer's global bifurcation theorem. Our main results are sharp and improve the main results by Torres (2003).
To access the full article, please see PDF.
This article is published under license to BioMed Central Ltd. 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.