Symmetric piecewise linear bi-dimensional systems are very common in control engineering. They constitute a class of non-differentiable vector fields for which classical Hopf bifurcation theorems are not applicable. For such systems, sufficient and necessary conditions for bifurcation of a limit cycle from the periodic orbit at infinity are given.
@article{urn:eudml:doc:41281, title = {Hoptf bifurcation from infinity for planar control systems.}, journal = {Publicacions Matem\`atiques}, volume = {41}, year = {1997}, pages = {181-198}, mrnumber = {MR1461650}, zbl = {0883.34043}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:41281} }
Llibre, Jaume; Ponce, Enrique. Hoptf bifurcation from infinity for planar control systems.. Publicacions Matemàtiques, Tome 41 (1997) pp. 181-198. http://gdmltest.u-ga.fr/item/urn:eudml:doc:41281/