Article ID Journal Published Year Pages File Type
1710002 Applied Mathematics Letters 2010 4 Pages PDF
Abstract

One important question in population models is whether periodic solutions exist and whether they are bounded between minimal and maximal solutions. This paper deals with the existence of maximal and minimal periodic solutions for the periodic solutions of a first-order functional differential equation y′(t)=−a(t)y(t)+f(t,y(t−τ(t)))y′(t)=−a(t)y(t)+f(t,y(t−τ(t))) by using the method of lower and upper solutions.

Related Topics
Physical Sciences and Engineering Engineering Computational Mechanics
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