PUBLICATIONS MATHÉMATIQUES DE L'IHES

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E 2 -cells and mapping class groups
Publications Mathématiques de l'IHÉS, Volume 130 (2019), pp. 1-61
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We prove a new kind of stabilisation result, “secondary homological stability,” for the homology of mapping class groups of orientable surfaces with one boundary component. These results are obtained by constructing CW approximations to the classifying spaces of these groups, in the category of E 2 -algebras, which have no E 2 -cells below a certain vanishing line.

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DOI: 10.1007/s10240-019-00107-8

Søren Galatius 1; Alexander Kupers 1; Oscar Randal-Williams 1

1 
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Søren Galatius; Alexander Kupers; Oscar Randal-Williams. $E_{2}$-cells and mapping class groups. Publications Mathématiques de l'IHÉS, Volume 130 (2019), pp. 1-61. doi: 10.1007/s10240-019-00107-8

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