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).
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