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Subharmonic solutions with prescribed minimal period for nonautonomous Hamiltonian systems. (English) Zbl 0645.34038
The authors study the system (*) $J\dot z=H\sb z(z,t)$ where J is the symplectic matrix and $H(z,t+T)=H(z,t)$, and they seek solutions satisfying $z(0)=z(pT)$, for any integer $p>1$. $H(z,t)$ is assumed to satisfy both convexity and growth conditions in z. Using analytical as well as topological techniques they establish the existence of subharmonic solutions.
Reviewer: H.Hochstadt

MSC:
34C25Periodic solutions of ODE
37-99Dynamic systems and ergodic theory (MSC2000)
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References:
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