The cobordism group of homology cylinders
The cobordism group of homology cylinders
复制标题
同调圆柱的共边群
DOI:
10.1112/s0010437x10004975
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发表时间:
2009
影响因子:
1.8
通讯作者:
Taehee Kim
中科院分区:
文献类型:
--
作者:
Jae Choon Cha;Stefan Friedl;Taehee Kim
Abstract Garoufalidis and Levine introduced the homology cobordism group of homology cylinders over a surface. This group can be regarded as an enlargement of the mapping class group. Using torsion invariants, we show that the abelianization of this group is infinitely generated provided that the first Betti number of the surface is positive. In particular, this shows that the group is not perfect. This answers questions of Garoufalidis and Levine, and Goda and Sakasai. Furthermore, we show that the abelianization of the group has infinite rank for the case that the surface has more than one boundary component. These results also hold for the homology cylinder analogue of the Torelli group.
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DOI:
--
发表时间:
2020
期刊:
影响因子:
--
作者:
樋口健太;森岡 悠;瀬川悦生;野崎雄太
通讯作者:
野崎雄太
DOI:
--
发表时间:
2011
期刊:
Geometriae Delicata
影响因子:
--
作者:
H.Goda;T.Sakasai
通讯作者:
T.Sakasai
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Hiroshi Goda;Makiko Ishiwata;合田洋;合田 洋;Hiroshi Goda
通讯作者:
Hiroshi Goda
影响因子:
0.6
作者:
Imai;M.;中原淳・溝上慎一;H. Goda and T. Sakasai
通讯作者:
H. Goda and T. Sakasai