KEBDANI, ChaimaaHellal, Meryem2024-12-102024-12-102023http://dspace.univ-temouchent.edu.dz/handle/123456789/5857This work aims to present the concepts of dynamic system and analysis of mathematical models adapted to biology such as the Goodwin, and Beddington-DeAngelis model, which lead to a Hopf bifurcation.frThesis