The unstable integral homology of the mapping class groups of a surface with boundary

Details The unstable integral homology of the mapping class groups of a surface with boundary The unstable integral homology of the mapping class groups of a surface with boundary

2005-01-19

arxiv.org/abs/math/0501304v2

Math. Ann. 337 (2007), no. 1, 15--60

Mathematics

Algebraic Topology

41 pages, 10 figures

Scientific paper

We construct a graph complex calculating the integral ho- mology of the bordered mapping class groups. We compute the ho- mology of the bordered mapping class groups of various surfaces. Using the circle action on this graph complex, we build a double complex and a spectral sequence converging to the homology of the unbordered mapping class groups. We compute the homology of the punctured mapping class groups associated to certain surfaces. Finally, we use Miller's operad to get the first Kudo-Araki and Browder operations on our graph complex. We also consider an unstable version of the higher Kudo-Araki-Dyer-Lashoff operations.

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