Quotients of the curve complex
Groups, geometry, and dynamics, Tome 18 (2024) no. 2, pp. 379-405

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DOI

We consider three kinds of quotients of the curve complex, which are obtained by coning off uniformly quasiconvex subspaces: symmetric curve sets, non-maximal train track sets, and compression body disc sets. We show that the actions of the mapping class group on those quotients are strongly weakly properly discontinuously (WPD), which implies that the actions are non-elementary and those quotients are of infinite diameter.
DOI : 10.4171/ggd/768
Classification : 37E30, 20F65, 57M50
Mots-clés : surface, curve complex, mapping class group, train track, compression body

Joseph Maher  1   ; Hidetoshi Masai  2   ; Saul Schleimer  3

1 CUNY College of Staten Island and CUNY Graduate Center, Staten Island, USA
2 Tokyo Institute of Technology, Tokyo, Japan
3 University of Warwick, Coventry, UK
Joseph Maher; Hidetoshi Masai; Saul Schleimer. Quotients of the curve complex. Groups, geometry, and dynamics, Tome 18 (2024) no. 2, pp. 379-405. doi: 10.4171/ggd/768
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