Based on the Hamiltonian principle, the coupled nonlinear functions of the system are presented as a Neumann problem.

由哈米尔顿原理作为动力学基础，建立起系统的非线性耦合运动方程组。

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The existence of multiple solutions is obtained for Neumann problem of sublinear elliptic equations by the minimax methods in the critical point theory.

用临界点理论中的极小极大方法得到了次线性椭圆方程Neumann问题多重解的存在性。

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The existence of multiple solutions is obtained for Neumann problem of sublinear elliptic equations by the minimax methods in the critical point theory.

用临界点理论中的极小极大方法得到了次线性椭圆方程Neumann问题多重解的存在性。

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