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On a question of Etnyre and Van Horn-Morris
Journal article   Open access   Peer reviewed

On a question of Etnyre and Van Horn-Morris

Tetsuya Ito and Keiko Kawamuro
Algebraic & geometric topology, Vol.17(1), pp.561-566
01/01/2017
DOI: 10.2140/agt.2017.17.561

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Abstract

The purpose of this note is to answer Question 6.12 of Etnyre and Van Horn-Morris [ Monoids in the mapping class group, Geom. Topol. Monographs 19 (2015) 319365], asking when the set of mapping classes whose fractional Dehn twist coefficient is greater than a given constant forms a monoid.
Mathematics Physical Sciences Science & Technology

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