Concordance group and stable commutator length in braid groups
Concordance group and stable commutator length in braid groups
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编织组中的一致性组和稳定换向器长度
DOI:
10.2140/agt.2015.15.2861
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发表时间:
2014
期刊:
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通讯作者:
Jarek Kkedra
中科院分区:
文献类型:
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作者:
Michael Brandenbursky;Jarek Kkedra
We define a quasihomomorphism from braid groups to the concordance group of knots and examine its properties and consequences of its existence. In particular, we provide a relation between the stable four ball genus in the concordance group and the stable commutator length in braid groups, and produce examples of infinite families of concordance classes of knots with uniformly bounded four ball genus. We also provide applications to the geometry of the infinite braid group. In particular, we show that its commutator subgroup admits a stably unbounded conjugation invariant norm. This answers an open problem posed by Burago, Ivanov and Polterovich.
DOI:
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DOI:
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发表时间:
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期刊:
The Journal of Symplectic Geometry
影响因子:
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作者:
馬場 裕美;末吉 紀行;亀下 勇;馬場 裕美;Morimichi Kawasaki
通讯作者:
Morimichi Kawasaki