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The stratum of random mapping classes

Published online by Cambridge University Press:  02 May 2017

VAIBHAV GADRE
Affiliation:
School of Mathematics and Statistics, University of Glasgow, 15 University Gardens, Glasgow G12 8QW, UK email [email protected]
JOSEPH MAHER
Affiliation:
Department of Mathematics, College of Staten Island, CUNY, 2800 Victory Boulevard, Staten Island, NY 10314, USA email [email protected] Department of Mathematics, 4307 Graduate Center, CUNY, 365 5th Avenue, New York, NY 10016, USA

Abstract

We consider random walks on the mapping class group that have finite first moment with respect to the word metric, whose support generates a non-elementary subgroup and contains a pseudo-Anosov map whose invariant Teichmüller geodesic is in the principal stratum. For such random walks, we show that mapping classes along almost every infinite sample path are eventually pseudo-Anosov, with invariant Teichmüller geodesics in the principal stratum. This provides an answer to a question of Kapovich and Pfaff [Internat. J. Algebra Comput.25, 2015 (5) 745–798].

Type
Original Article
Copyright
© Cambridge University Press, 2017 

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