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Homology of the moduli spaces and mapping class groups of framed, r-Spin and Pin surfaces

机译:框架,r-Spin和Pin曲面的模空间和映射类组的同源性

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We give definitions of moduli spaces of framed, r-Spin and Pin~± surfaces. We apply earlier work of the author to show that each of these moduli spaces exhibits homological stability, and we identify the stable integral homology with that of certain infinite loop spaces in each case. We further show that these moduli spaces each have path components that are Eilenberg–MacLane spaces for the framed, r-Spin and Pin~± mapping class groups, respectively, and hence we also identify the stable group homology of these groups. In particular, the stable framed mapping class group has trivial rational homology, and its abelianization is Z/24; the rational homology of the stable Pin~± mapping class groups coincides with that of the non-orientable mapping class group, and their abelianizations are Z/2 for Pin~+ and (Z/2)~3 for Pin~?.
机译:我们给出了带框架的,r-Spin和Pin〜±曲面的模空间的定义。我们应用作者较早的工作来证明这些模空间中的每一个都表现出同源稳定性,并且在每种情况下我们都与某些无限环空间确定了稳定的整体同源性。我们进一步表明,这些模空间每个都具有分别为框架,r-Spin和Pin〜±映射类组的Eilenberg–MacLane空间的路径分量,因此,我们还确定了这些组的稳定组同源性。特别地,稳定的有框映射类组具有琐碎的有理同源性,其阿贝尔化为Z / 24。稳定的Pin〜±映射类组的有理同源性与不可定向的映射类组的有理同源性,Pin〜+的阿贝尔化为Z / 2,Pin〜?的(A / 2)〜3。

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