Periodic solutions of second order non-autonomous singular dynamical systems

Periodic solutions of second order non-autonomous singular dynamical systems
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二阶非自治奇异动力系统的周期解

DOI:
10.1016/j.jde.2007.05.007
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发表时间:
2007-08
影响因子:
2.4
通讯作者:
Zhang, Meirong
Zhang, Meirong
中科院分区:
数学2区
文献类型:
--
作者:
Chu, Jifeng;Torres, Pedro J.;Zhang, Meirong

文献摘要

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本文建立了二阶非自治奇异动力系统正周期解的两个不同的存在性结果。第一个是基于Leray-Schauder的非线性择一原理,其结果既适用于强奇异性的情况,也适用于弱奇异性的情况。第二个是基于Schauder的不动点定理和结果揭示了一些新的光与弱奇异性的问题,并证明在某些情况下,弱奇异性可能有助于创建周期解。文献中的最新结果得到推广和显着改进。
In this paper, we establish two different existence results of positive periodic solutions for second order non-autonomous singular dynamical systems. The first one is based on a nonlinear alternative principle of Leray–Schauder and the result is applicable to the case of a strong singularity as well as the case of a weak singularity. The second one is based on Schauder's fixed point theorem and the result sheds some new light on problems with weak singularities and proves that in some situations weak singularities may help create periodic solutions. Recent results in the literature are generalized and significantly improved.
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