2 papers
math.DS2017
On the existence of limit cycles and invariant surfaces of sewing piecewise linear differential systems on
Bruno Rodrigues de Freitas, João Carlos Medrado
We consider a class of discontinuous piecewise linear differential systems in with two pieces separated by a plane. In this class we show that there exist differenti…
math.DS2017
Birth of isolated nested cylinders and limit cycles in 3D piecewise smooth vector fields with symmetry
Tiago Carvalho, Bruno Rodrigues de Freitas
Our start point is a 3D piecewise smooth vector field defined in two zones and presenting a shared fold curve for the two smooth vector fields considered. Moreover, these smooth ve…