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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:158/0  |  提交时间:2020/01/10
Invariant torus  small frequency  degeneracy  finite differentiability  
Numerical invariant tori of symplectic integrators for integrable Hamiltonian systems 期刊论文
SCIENCE CHINA-MATHEMATICS, 2018, 卷号: 61, 期号: 9, 页码: 1567-1588
作者:  Ding, Zhaodong;  Shang, Zaijiu
收藏  |  浏览/下载:151/0  |  提交时间:2018/10/07
Hamiltonian systems  symplectic integrators  KAM theory  invariant tori  twist symplectic mappings  Russmann's non-degeneracy  
A note on the cover degeneracy of graphs 期刊论文
JOURNAL OF GRAPH THEORY, 2006, 卷号: 51, 期号: 2, 页码: 170-173
作者:  Zhang, L;  Wu, BYDR
收藏  |  浏览/下载:83/0  |  提交时间:2018/07/30
planar graph  cover degeneracy  chromatic number