Existence of positive periodic solutions to nonlinear second order differential equations

In this paper, we discuss the existence of positive periodic solutions to the nonlinear differential equation u (t) + a(t)u(t) = f (t, u(t)), t R, where a : R [0, +) is an -periodic continuous function with a(t) 0, f : R

• Type: Journal
• Year: 2005
• Where: APPML
• Authors: Fuyi Li, Zhanping Liang
• Keywords: -periodic Continuous Function, APPML 2005, Fixed Point Index, Positive Periodic Solutions