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00925njm 22002777a 4500 dc Di Bernardo, Mario author Pagano, Daniel J. author Ponce, Enrique author Centre de Recerca Matemàtica author 2007 Boundary equilibrium bifurcations in piecewise smooth discontinuous systems are characterized by the collision of an equilibrium point with the discontinuity surface. Generically, these bifurcations are of codimension one, but there are scenarios where the phenomenon can be of higher codimension. Here, the possible collision of a non-hyperbolic equilibrium with the boundary in a two-parameter framework and the nonlinear phenomena associated with such collision are considered. By dealing with planar discontinuous (Filippov) systems, some of such phenomena are pointed out through specific representative cases. A methodology for obtaining the corresponding bi-parametric bifurcation sets is developed. Bifurcació, Teoria de la Sistemes dinàmics diferenciables Non-hyperbolic boundary equilibrium bifurcations in planar Filippov systems: a case study approach