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Trivial cocycles and invariants of homology 3-spheres
被引:5
作者:
Pitsch, Wolfgang
[1
]
机构:
[1] Univ Autonoma Barcelona, Dept Matemat, E-08193 Bellaterra, Spain
关键词:
Torelli group;
Casson invariant;
Heegaard splitting;
Homology spheres;
3-DIMENSIONAL HANDLEBODY;
CASSON INVARIANT;
SURFACE BUNDLES;
TORELLI GROUP;
HOMEOMORPHISMS;
D O I:
10.1016/j.aim.2008.09.002
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
We study the relationship between trivial cocycles on the Torelli group and invariants of oriented integral homology 3-spheres. We apply this study to give a new purely algebraic construction of the Casson invariant. As a by-product we get a new 2-torsion cohomology class in the second integral cohomology of the Torelli group. (c) 2008 Elsevier Inc. All rights reserved.
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页码:278 / 302
页数:25
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