Multiple Periodic Solutions for $\Gamma$-symmetric Newtonian Systems

Mieczyslaw Dabkowski, Wieslaw Krawcewicz, Yanli Lv +1

The existence of periodic solutions in $\Gamma$-symmetric Newtonian systems $\ddot{x}=-\nabla f(x)$ can be effectively studied by means of the $(\Gamma \times O(2))$-equivariant gradient degr…