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ON THE EXISTENCE OF INVARIANT TORI IN NON-CONSERVATIVE DYNAMICAL SYSTEMS WITH DEGENERACY AND FINITE DIFFERENTIABILITY 期刊论文
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS, 2019, 卷号: 39, 期号: 7, 页码: 4225-4257
作者:  Li, Xuemei;  Shang, Zaijiu
收藏  |  浏览/下载:154/0  |  提交时间:2020/01/10
Invariant torus  small frequency  degeneracy  finite differentiability  
Quasi-Periodic Solutions for Differential Equations with an Elliptic-Type Degenerate Equilibrium Point Under Small Perturbations 期刊论文
JOURNAL OF DYNAMICS AND DIFFERENTIAL EQUATIONS, 2019, 卷号: 31, 期号: 2, 页码: 653-681
作者:  Li, Xuemei;  Shang, Zaijiu
收藏  |  浏览/下载:139/0  |  提交时间:2020/01/10
Delay differential equation  Degenerate equilibrium point  Quasi-periodic solution  Perturbation