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Existence theorems of periodic solutions for fourth-order nonlinear functional difference equations

机译:四阶非线性泛函差分方程周期解的存在性定理

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摘要

By using of the critical point method, the existence of periodic solutions for fourth-order nonlinear functional difference equations is obtained. The main approaches used in our paper are variational techniques and the Saddle Point Theorem. The problem is to solve the existence of periodic solutions of fourth-order nonlinear functional difference equations. Results obtained generalize and complement the existing one.
机译:利用临界点方法,获得了四阶非线性泛函差分方程周期解的存在性。本文使用的主要方法是变分技术和鞍点定理。问题是要解决四阶非线性泛函差分方程周期解的存在性。获得的结果可以概括并补充现有的结果。

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