Yan Liu, Quanyi Wang
Abstract:
In this paper, we study a periodic ratio-dependent predator-prey
system of two species with impulse and multiple time delays.
By means of analysis techniques and the continuation theorem
of coincidence degree theory, we obtain sufficient conditions
for the existence of positive periodic solutions of the system.
Our results extend previous results obtained in [9].
Submitted May 28, 2008. Published December 3, 2008.
Math Subject Classifications: 34K45, 34K13, 92D25.
Key Words: Positive periodic solution; ratio-dependent;
time delay; predator-prey system; impulse;
coincidence degree theory.
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Yan Liu School of mathematical sciences, Huaqiao University Quanzhou, Fujian 362021, China email: liuyanlxly@yahoo.com.cn | |
Quanyi Wang School of mathematical sciences, Huaqiao University Quanzhou, Fujian 362021, China email: qywang@hqu.edu.cn |
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