Existence of periodic solutions for first-order delay differential equations via critical point theory

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作者
Shao-Kang Zhang
Lichun Chen
机构
[1] Zhaotong University,Department of Mathematics and Statistics
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关键词
weak linking; linking; periodic solution; critical point;
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摘要
By the weak linking theorem and the linking theorem, we study the existence of periodic solutions for the following system of delay differential equations:
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