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Existence of a polycycle in non-Lipschitz Gause-type predator-prey models
Authors:José Luis Bravo  Manuel Fernández  Manuel Gámez
Institution:a Departamento de Matemáticas, Universidad de Extremadura, Spain
b Departamento de Estadística y Matemática Aplicada, Universidad de Almería, 04120 Almería, Spain
c Departamento de Matemáticas, Facultad de Ciencias, Universidad de los Andes, 5101 Mérida, Venezuela
Abstract:We study Gause-type predator-prey models when the interaction between predator and prey is not locally-Lipschitz continuous in the absence of one of them. We shall show that in this case there appears a polycycle, which affects the existence of limit cycles for the system. We apply the results to study the existence of limit cycles for a classical Gause system.
Keywords:Predator-prey  Heteroclinic  Polycycle
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