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APPML
2005
82views more  APPML 2005»
13 years 10 months ago
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 -peri...
Fuyi Li, Zhanping Liang
APPML
2010
101views more  APPML 2010»
13 years 11 months ago
Positive periodic solutions for higher order functional difference equations
In this paper, we apply a fixed point theorem to obtain sufficient conditions for the existence of positive periodic solutions for two classes of higher-order functional differenc...
Weibing Wang, Xinhong Chen