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| Paper IPM / M / 462 |
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| Abstract: | |||||
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In this paper we consider a predator-prey system with a sigmoid
functional response of the form φ(x) = xn/ (a+xn), n > 1.
Following Sugie et al. results in [8] and [9], by taking advantage
of Freedman and So's theorem in [3], we present a sufficient and
necessary condition for the nonexistence of limit cycles of this
system with n > 1.
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