J4 ›› 2013, Vol. 51 ›› Issue (01): 64-68.
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GUO Wei
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We studied the existence of positive periodic solutions for a nonautonomous cooperative system with discrete time and several de lays by means of the continuation theorem based on coincidence degree theory. One bounded open set was obtained by virtue of analytic technique. With the help of the coincidence degree theory, a set of sufficient conditions for this system to have at least one positive periodic solution were obtained. The research result reveals the nonautonomous cooperative system with discrete time and several delays will produce periodic oscillation of biological nature, and the time delay is harmless.
Key words: cooperative system; several delays; positive periodic solution; coincidence degree theory
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GUO Wei. Positive Periodic Solution of a Discrete Time NonautonomousCooperative System with Several Delays[J].J4, 2013, 51(01): 64-68.
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