The Palais-Smale condition on contact type energy levels for convex Lagrangian systems
The Palais-Smale condition on contact type energy levels for convex Lagrangian systems
复制标题
凸拉格朗日系统接触型能级的 Palais-Smale 条件
DOI:
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发表时间:
2003
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通讯作者:
G. Contreras
中科院分区:
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作者:
G. Contreras
We prove that for a uniformly convex Lagrangian system L on a compact manifold M, almost all energy levels contain a periodic orbit. We also prove that below Mañé's critical value of the lift of the Lagrangian to the universal cover, cu(L), almost all energy levels have conjugate points.We in addition prove that if an energy level is of contact type, projects onto M and $$M\ne{\mathbb T}^2$$, then the free time action functional of L+k satisfies the Palais-Smale condition.