%0 Journal Article
%T Four positive periodic solutions of a discrete time Lotka-Volterra competitive system with harvesting terms
%A Xinggui Liu
%A Yaping Ren
%A Yongkun Li
%J Opuscula Mathematica
%D 2011
%I AGH University of Science and Technology
%X In this paper, by using Mawhin's continuation theorem of coincidence degree theory, we establish the existence of at least four positive periodic solutions for a discrete time Lotka-Volterra competitive system with harvesting terms. An example is given to illustrate the effectiveness of our results.
%K discrete systems
%K Lotka-Volterra competitive models
%K coincidence degree
%K harvesting termsn
%U http://www.opuscula.agh.edu.pl/vol31/2/art/opuscula_math_3117.pdf