Tuesday, September 13, 2022
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All day |
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4:00pm |
09/13/2022 - 4:15pm This talk is about hyperbolicity of surface group extensions and a question of Farb-Mosher about whether purely pseudo-Anosov subgroups of mapping class groups are convex cocompact. We’ll explain this problem and give an answer for subgroups of the genus-2 Goeritz group, which is the group of mapping classes of a genus-2 surface that extend to the genus-2 Heegaard splitting of the 3-sphere. In addition we give a refined version of the Nielsen-Thurston classification for the Goeritz group. Location:
LOM 214
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