Yan Liu, Quanyi Wang
Abstract: 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 |
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Quanyi Wang School of mathematical sciences, Huaqiao University Quanzhou, Fujian 362021, China email: qywang@hqu.edu.cn |
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