Quasi-morphisms on surface diffeomorphism groups
Quasi-morphisms on surface diffeomorphism groups
复制标题
表面微分同胚群上的拟同态
DOI:
10.1090/jams/981
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发表时间:
2021
影响因子:
3.9
通讯作者:
Bowden J
中科院分区:
文献类型:
--
作者:
Bowden J
We show that the identity component of the group of diffeomorphisms of a closed oriented surface of positive genus admits many unbounded quasi-morphisms. As a corollary, we also deduce that this group is not uniformly perfect and its fragmentation norm is unbounded, answering a question of Burago–Ivanov–Polterovich. As a key tool we construct a hyperbolic graph on which these groups act, which is the analog of the curve graph for the mapping class group. References
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影响因子:
1.3
作者:
R. Brooks
通讯作者:
R. Brooks
影响因子:
1
作者:
Alexander J. Rasmussen
通讯作者:
Alexander J. Rasmussen
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
U. Hamenstaedt
通讯作者:
U. Hamenstaedt
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
D. Ruelle
通讯作者:
D. Ruelle
DOI:
10.2140/gt.2016.20.491
发表时间:
2014
期刊:
arXiv: Geometric Topology
影响因子:
--
作者:
Juliette Bavard
通讯作者:
Juliette Bavard