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arXiv · 2407.13824

A note on separability in outer automorphism groups

Francesco Fournier-Facio
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Abstract

We give a criterion for separability of subgroups of certain outer automorphism groups. This answers questions of Hagen and Sisto, by strengthening and generalizing a result of theirs on mapping class groups.

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Francesco Fournier-Facio. 2025-01-06. A note on separability in outer automorphism groups. https://doi.org/10.1017/s0013091525000045

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