Homoclinic boundary-saddle bifurcations in nonsmooth vector fields
Abstract
In a smooth dynamical system, a homoclinic connection is a closed orbit returning to a saddle equilibrium. Under perturbation, homoclinics are associated with bifurcations of periodic orbits, and with chaos in higher dimensions. Homoclinic connections in nonsmooth systems are complicated by their interaction with discontinuities in their vector fields. A connection may involve a regular saddle outside a discontinuity set, or a pseudo-saddle on a discontinuity set, with segments of the connection allowed to cross or slide along the discontinuity. Even the simplest case, that of connection to a regular saddle that hits a discontinuity as a parameter is varied, is surprisingly complex. Bifurcation diagrams are presented here for non-resonant saddles in the plane, including an example in a forced pendulum.
Cite
@article{arxiv.1701.05857,
title = {Homoclinic boundary-saddle bifurcations in nonsmooth vector fields},
author = {Kamila da Silva Andrade and Mike R. Jeffrey and Ricardo M. Martins and Marco A. Teixeira},
journal= {arXiv preprint arXiv:1701.05857},
year = {2017}
}
Comments
39 pages, 35 figures