Bifurcations of Non Smooth Vector Fields on $\R^2$ by Geometric Singular   Perturbations
  Our object of study is non smooth vector fields on $\R^2$. We apply the techniques of geometric singular perturbations in non smooth vector fields after regularization and a blow$-$up. In this way we are able to bring out some results that bridge the space between non$-$smooth dynamical systems presenting typical singularities and singularly perturbed smooth systems. 
Tiago de Carvalho and Durval Jose Tonon
math.DS