Existence and Uniqueness of Positive Periodic Solution of an Extended Rosenzweig-MacArthur Model via Brouwer's Topological Degree
Enobong E. Joshua
Department of Mathematics/Statistics, University of Uyo, Uyo, Nigeria.
Ekemini T. Akpan *
Department of Science Education, University of Uyo, Uyo, Nigeria.
Olukayode Adebimpe
Department of Physical Sciences, Landmark University, Omu-Aran, Nigeria .
Chinwendu E. Madubueze
Department of Mathematics/Statistics/Computer Science, University of Agriculture, Makurdi, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
The necessary conditions for existence of periodic solutions of an Extended Rosenzweig-MacArthur model are obtained using Brouwer's degree. The forward invariant set is formulated to ensure the boundedness of the solutions, using Brouwers xed point properties, and Zornslemma. Also, sucient conditions for the existence of a unique positive periodic solution have been established using Barbalats lemma and Lyapunovs functional. Numerical responses show that, the phase-ows of the non-autonomous system exhibit an asymptotically stable periodic solution which is globally attractive and trapped in the absorbing region.
Keywords: Periodic solutions, global attractivity, brouwers degree, lyapunovs functional