Linear representations of Aut (Fr) on the homology of representation varieties

Yael Algom-Kfir; Asaf Hadari

doi:10.1007/s10711-020-00530-w

Linear representations of Aut (F_r) on the homology of representation varieties

Yael Algom-Kfir, Asaf Hadari

Department of Mathematics

Research output: Contribution to journal › Article › peer-review

Abstract

Let G be a compact semisimple linear Lie group. We study the action of Aut (F_r) on the space H_∗(G^r; Q). We compute the image of this representation and prove that it only depends on the rank of g. We show that the kernel of this representation is always the Torrelli subgroup IA _r of Aut (F_r).

Original language	English
Pages (from-to)	199-206
Number of pages	8
Journal	Geometriae Dedicata
Volume	209
Issue number	1
DOIs	https://doi.org/10.1007/s10711-020-00530-w
State	Published - 1 Dec 2020

Bibliographical note

Publisher Copyright:
© 2020, Springer Nature B.V.

Keywords

Automorphism groups
Homology
Representation varieties
Torelli group

ASJC Scopus subject areas

Geometry and Topology

Access to Document

10.1007/s10711-020-00530-w

Cite this

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