Sep 6, 2004 · Our purpose of this paper is by using the generalized form of Leggett–Williams fixed point theorem [2], to prove that (1.2) has at least two positive periodic ...
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Theorems on the existence of at least three positive periodic solutions to various forms of first-order functional differential equations involving a ...
Jun 13, 2002 · We assume that λ, a(n), f(x) and h(n) are nonnegative with 0 < a(n) < 1 for all n ∈ [0,T − 1]. The existence of multiple positive periodic ...
Sep 6, 2004 · Recently, Cheng and Zhang [1] has investigated the existence of positive periodic solutions for the first-order functional differential equation ...
Positive periodic solutions of nonlinear differential equations ... Article PDF. Download to read the full article text. Similar content being viewed by others ...
In this paper, a type of nonlinear neutral functional differential equations are considered. Some results on the existence of three positive periodic solutions ...
We establish the existence of at least three positive periodic solutions to the second order differential equation with periodic coefficients ...
Apr 19, 2020 · This paper deals with the existence of three positive periodic solutions for a class of second order neutral functional differential equations ...
Oct 22, 2024 · Positive periodic solutions and nonlinear eigenvalue problems for functional differential equations. Article. Mar 2012; ELECTRON J QUAL THEO.
Positive periodic solutions of nonlinear functional difference equations. Raffoul, Youssef N. Electronic Journal of Differential Equations (EJDE) ...