On Herman's positive entropy conjecture
On Herman's positive entropy conjecture
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论赫尔曼的正熵猜想
DOI:
10.1016/j.aim.2019.04.002
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发表时间:
2019
影响因子:
1.7
通讯作者:
Berger P
中科院分区:
文献类型:
--
作者:
Berger P
We show that any area-preserving C r-diffeomorphism of a two-dimensional surface displaying an elliptic fixed point can be C r-perturbed to one exhibiting a chaotic island whose metric entropy is positive, for every 1≤ r≤∞. This proves a conjecture of Herman stating that the identity map of the disk can be C∞-perturbed to a conservative diffeomorphism with positive metric entropy. This implies also that the Chirikov standard map for large and small parameter values can be C∞-approximated by a conservative diffeomorphisms displaying a positive metric entropy (a weak version of Sinai's positive metric entropy conjecture). Finally, this sheds light onto a Herman's question on the density of C r-conservative diffeomorphisms displaying a positive metric entropy: we show the existence of a dense set formed by conservative diffeomorphisms which either are weakly stable (so, conjecturally, uniformly hyperbolic) or display a chaotic island of positive metric entropy.
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DOI:
10.1007/s10240-003-0008-0
发表时间:
2003-05
期刊:
Publications Mathématiques de l'Institut des Hautes Études Scientifiques
影响因子:
--
作者:
C. Bonatti;L. Díaz
通讯作者:
C. Bonatti;L. Díaz
DOI:
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发表时间:
2014
期刊:
影响因子:
--
作者:
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通讯作者:
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DOI:
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发表时间:
2006
期刊:
影响因子:
--
作者:
J. Palis;J. Yoccoz
通讯作者:
J. Yoccoz
DOI:
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发表时间:
2004
期刊:
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作者:
C. Liverani
通讯作者:
C. Liverani
影响因子:
0.9
作者:
V. Gelfreich;V. Lazutkin
通讯作者:
V. Gelfreich;V. Lazutkin