Palavra-chave: NON-SMOOTH VECTOR FIELDS

CLOSED ORBIT BIFURCATION SINGULARITY SINGULAR PERTURBATION REGULARIZATION ALGEBRAIC VARIETIES NORMAL FORM SLOW MANIFOLD BASIN OF ATTRACTION ASYMPTOTIC STABILITY ATTRACTOR INVARIANT TORI LIMIT CYCLE EQUILIBRIUM FOLD-FOLD STABILITY TOPOLOGICAL INVARIANT FIRST INTEGRAL REFRACTIVE VECTOR FIELD STRUCTURAL STABILITY REVERSIBILIDADE SINGULARIDADE