Subharmonic Solutions In Reversible Non-Autonomous Differential Equations

Izuchukwu Eze, Carlos Garcia-Azpeitia, Wieslaw Krawcewicz +1

We study the existence of subharmonic solutions in the system $\ddot{u}(t)=f(t,u(t))$, where $u(t)\in {\mathbb{R}}^k$ and $f$ is an even and $p$-periodic function in time. Under so…