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arXiv:math/0405386 [math.GT]AbstractReferencesReviewsResources

K_g is not finitely generated

Daniel Biss, Benson Farb

Published 2004-05-20, updated 2005-08-23Version 2

We prove that for any genus g>1, the subgroup K_g of the mapping class group of a closed genus g surface generated by Dehn twists about separating curves is not finitely generated.

Comments: 17 pages, 2 figures
Categories: math.GT, math.GR
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