Palavra-chave: SINGULARITY

CENTER IMPASSE DIVERGENT DIAGRAM TOPOLOGICAL INVARIANT APOCALIPSE ARRIVA LA FINE DEL MONDO INVOLUTION BASIN OF ATTRACTION VECTOR FIELD NORMAL FORM ATTRACTOR RELAY SYSTEM PERIODIC ORBIT SIMILARITY ELLIPTIC BOUNDARY VALUE PROBLEMS NONLINEAR ELLIPTIC BOUNDARY VALUE PROBLEMS REVERSIBILITY FINISMO FIM DO MUNDO SINGULAR PERTURBATION BIFURCATION DIFFERENTIAL FORM STRUCTURAL STABILITY NONSMOOTH DYNAMICAL SYSTEMS REGULARIZATION CAMPO DE VETORES POROUS MEDIA FIXED POINT THEOREMS IMPLICIT DIFFERENTIAL EQUATIONS SIGNED SOLUTIONS CONLEY INDEX NUMERICAL SOLUTION VERSAL UNFOLDING RESONANCE ASYMPTOTIC STABILITY STABILITY LIMIT CYCLE DISCONTINUOUS DIFFERENTIAL EQUATIONS CLOSED ORBIT NON-SMOOTH VECTOR FIELDS CYCLE HAMILTONIAN ROBERTO ALAJMO SLIDING VECTOR FIELD DISCONTINUOUS VECTOR FIELD TWOFOLD FOLD-FOLD