Palavra-chave: BIFURCATION

CYCLE PREDATOR-PREY MODEL HIDDEN PRE CENTER EXPLICIT PREY DISCONTINUOUS VECTOR FIELD SHILNIKOV PROBLEM FOLD-FOLD STABILITY STRUCTURAL STABILITY ASYMPTOTIC STABILITY VERSAL UNFOLDING FIRST INTEGRAL CLOSED ORBIT LOOP NONSMOOTH DYNAMICAL SYSTEMS AVERAGING FILIPPOV SYSTEMS HAMILTONIAN DIFFEOMORPHISM REFRACTIVE VECTOR FIELD LIMIT CYCLE REGULARIZATION VECTOR FIELD NON-SMOOTH VECTOR FIELDS NORMAL FORM PERIODIC ORBIT SINGULARITY