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2005年04月06日

【期刊论文】Solvability of Neumann Problem for Elliptic Equations at Resonance*

唐春雷， Chun-Lei Tang

，-0001，（）：

-1年11月30日

The existence results are obtained for solutions of the Neumann problem for non-linear elliptic equations at resonance with unbounded nonlinearities by the minimax methods.

Neumann problem,， resonance,， the Saddle Point Theo-rem,， critical point,， the Sobolev'， s embedding theorem,， Poincare inequality

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2005年04月06日

【期刊论文】Periodic and Subharmonic Solutions for a Class of Superquadratic Hamiltonian Systems*

唐春雷， Zeng-Qi Ou， Chun-Lei Tang

，-0001，（）：

-1年11月30日

摘要

Some existence theorems are obtained for periodic and subharmonic solutions of a class of su-perquadratic Hamiltonian systems by the minimax methods in critical point theory, specially, a local link theorem due to Li and Willem, and the Generalized Mountain Pass Theorem respectively.

periodic solutions， subharmonic solutions， Hamiltonian systems， the local link， the Generalized Mountain Pass Theorem,， the (， PS)， *， condition， the (， C)， condition

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2005年04月06日

【期刊论文】Periodic Solutions for Second Order Hamiltonian Systems with a change sign potential*

唐春雷， Chun-Lei Tang and Xing-Ping Wu

，-0001，（）：

-1年11月30日

摘要

An existence theorem is obtained for periodic solutions of nonautonomous second order Hamiltonian systems with a change sign potential by the minimax methods in critical point theory.

periodic solution,， second order Hamiltonian system,， the generalized mountain pass Theorem,， the (， PS)， condition,， Sobolev'， s inequality,， Wirtinger'， s inequality

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2005年04月06日

【期刊论文】Periodic Solutions for a Class of Nonautonomous Subquadratic Second Order Hamiltonian Systems*

唐春雷， Chun-Lei Tang and Xing-Ping Wu

，-0001，（）：

-1年11月30日

摘要

Some existence theorems are obtained for periodic solutions of a class of unbounded nonautonomous nonconvex subquadratic second order Hamiltonian systems by using the minimax methods in critical point theory

periodic solution,， second order Hamiltonian system,， the Saddle Point Theorem,， the (， PS)， condition,， Sobolev'， s inequality