Article ID Journal Published Year Pages File Type
4636841 Applied Mathematics and Computation 2006 13 Pages PDF
Abstract

With the help of differential equations with piecewise constant arguments, we first derive a discrete analogy of continuous three level food-chain model of Holling type II, which is governed by difference equations with periodic coefficients. A set of sufficient conditions is derived for the existence of positive periodic solutions with strictly positive components by using the continuation theorem in coincidence degree theory. Particularly, the upper and lower bounds of the periodic solutions are also established.

Related Topics
Physical Sciences and Engineering Mathematics Applied Mathematics
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