Geometric singular perturbation theory for non-smooth dynamical systems
From the closing remarks: ``Non-smooth singularly perturbed systems are studied in this paper. We investigate the effect of singular perturbations at tangency points. We prove that singularities of the type fold are robust with respect to singular perturbations. On the other hand, cusp singularities are not robust with respect to singular perturbations. We also study the unfolding of cusp singularities and hyperbolic equilibria.''
scientific article; zbMATH DE number 6381926