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Homological stability of topological moduli spaces

Accepted version
Peer-reviewed

Type

Article

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Authors

Abstract

Given a graded E1-module over an E2-algebra in spaces, we construct an augmented semi-simplicial space up to higher coherent homotopy over it, called its canonical resolution, whose graded connectivity yields homological stability for the graded pieces of the module with respect to constant and abelian coefficients. We furthermore introduce a notion of coefficient systems of finite degree in this context and show that, without further assumptions, the corresponding twisted homology groups stabilize as well. This generalizes a framework of Randal-Williams and Wahl for families of discrete groups. In many examples, the canonical resolution recovers geometric resolutions with known connectivity bounds. As a consequence, we derive new twisted homological stability results for e.g. moduli spaces of high-dimensional manifolds, unordered configuration spaces of manifolds with labels in a fibration, and moduli spaces of manifolds equipped with unordered embedded discs. This in turn implies representation stability for the ordered variants of the latter examples.

Description

Keywords

math.AT, math.AT, math.GT, 55P48, 55R40, 55R80, 57R19

Journal Title

Geometry and Topology

Conference Name

Journal ISSN

1465-3060
1364-0380

Volume Title

23

Publisher

Mathematical Sciences Publishers

Rights

All rights reserved