Bifurcação de Hopf em equações diferenciais com simetria

Abstract

In this work we study Hopf bifurcation in systems of di?erential equations that are equivariants under the action of a compact Lie group ?. Our main goal is to prove, under certain conditions, the existence of a branch of periodic solutions for such systems by using the Liapunov-Schmidt reduction, a procedure that induces an action of the circle group S1 on the space of continuous 2?-periodic functions. The main assumption to obtain the result is that the linearization of the system in a fixed point has purely imaginary eigenvalues