The Powell conjecture and reducing sphere complexes
The Powell conjecture and reducing sphere complexes
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鲍威尔猜想和约化球复形
DOI:
10.1112/jlms.12272
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Zupan, Alexander
中科院分区:
文献类型:
--
作者:
Zupan, Alexander
The Powell conjecture offers a finite generating set for the genusGoeritz group, the group of automorphisms ofthat preserve a genusHeegaard surface, generalizing a classical result of Goeritz in the case. We study the relationship between the Powell conjecture and the reducing sphere complex, the subcomplex of the curve complexspanned by the reducing curves for the Heegaard splitting. We prove that the Powell conjecture is true if and only ifis connected. Additionally, we show that reducing curves that meet in at most six points are connected by a path in; however, we also demonstrate that even among reducing curves meeting in four points, the distance inbetween such curves can be arbitrarily large. We conclude with a discussion of the geometry of.
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DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
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Erol Akbas
影响因子:
0.5
作者:
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DOI:
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2003
期刊:
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DOI:
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发表时间:
2010
期刊:
Geometric & Functional Analysis GAFA
影响因子:
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作者:
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通讯作者:
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DOI:
--
发表时间:
2001
期刊:
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作者:
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