Blazej Szepietowski
Published 2010-07-01, updated 2010-07-05Version 2
We show that on a nonorientable surface of genus at least 7 any power of a Dehn twist is equal to a single commutator in the mapping class group and the same is true, under additional assumptions, for the twist subgroup, and also for the extended mapping class group of an orientable surface of genus at least 3.
Comments: Two references and one paragraph added acknowledging the fact that some results were known already. 6 pages
Journal: Comptes Rendus Mathematique 348 (2010), 923-926
An algebraic characterization of a Dehn twist for nonorientable surfaces
Torsion Generators of the Twist Subgroup
The logarithms of Dehn twists
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