Homological Stability of Automorphism Groups of Quadratic Modules and Manifolds
Documenta mathematica, Tome 22 (2017), pp. 1729-1774
We prove homological stability for both general linear groups of modules over a ring with finite stable rank and unitary groups of quadratic modules over a ring with finite unitary stable rank. In particular, we do not assume the modules and quadratic modules to be well-behaved in any sense: for example, the quadratic form may be singular. This extends results by van der Kallen and Mirzaii-van der Kallen respectively. Combining these results with the machinery introduced by Galatius-Randal-Williams to prove homological stability for moduli spaces of simply-connected manifolds of dimension 2n≥6, we get an extension of their result to the case of virtually polycyclic fundamental groups.
@article{10_4171_dm_609,
author = {Nina Friedrich},
title = {Homological {Stability} of {Automorphism} {Groups} of {Quadratic} {Modules} and {Manifolds}},
journal = {Documenta mathematica},
pages = {1729--1774},
year = {2017},
volume = {22},
doi = {10.4171/dm/609},
url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/609/}
}
Nina Friedrich. Homological Stability of Automorphism Groups of Quadratic Modules and Manifolds. Documenta mathematica, Tome 22 (2017), pp. 1729-1774. doi: 10.4171/dm/609
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