We consider continuous piecewise-linear differential systems with three zones where the
central one is degenerate, that is, the determinant of its linear part vanishes. By moving one …

We study a class of planar continuous piecewise linear vector fields with three zones. Using
the Poincaré map and some techniques for proving the existence of limit cycles for smooth …

In this paper, we investigate the existence of one type of homoclinic double loops (ie figure-
eight loops) in a family of planar sector-wise linear systems with saddle–saddle dynamics …

In this paper, we study a family of planar piecewise linear systems with saddles separated
by two parallel lines, and mainly investigate the existence of four-intersection-point limit …

Resumo In 2012, Lima and Llibre in [3] have studied a class of planar continuous piecewise
linear vector fields with three zones. This class can be separated in four other classes and …

Este trabalho está relacionado ao estudo de bifurcações e órbitas periódicas de sistemas
diferenciais suaves por partes planares em duas e três zonas. Em sistemas com duas …

We study a class of planar continuous piecewise linear vector fields with three zones. Using
the Poincar\'e map and some techniques for proving the existence of limit cycles for smooth …