Chaotic Planar Piecewise Smooth Vector Fields With Non Trivial Minimal   Sets
  In this paper some aspects on chaotic behavior and minimality in planar piecewise smooth vector fields theory are treated. The occurrence of non-deterministic chaos is observed and the concept of orientable minimality is introduced. It is also investigated some relations between minimality and orientable minimality and observed the existence of new kinds of non-trivial minimal sets in chaotic systems. The approach is geometrical and involve the ordinary techniques of non-smooth systems. 
Claudio Buzzi, Tiago de Carvalho and Rodrigo Euzebio
math.DS