Central Extensions of Word Hyperbolic Groups
نویسندگان
چکیده
منابع مشابه
Central Extensions of Word Hyperbolic Groups
Thurston has claimed (unpublished) that central extensions of word hyperbolic groups by finitely generated abelian groups are automatic. We show that they are in fact biautomatic. Further, we show that every 2-dimensional cohomology class on a word hyperbolic group can be represented by a bounded 2-cocycle. This lends weight to the claim of Gromov that for a word hyperbolic group, the cohomolog...
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ژورنال
عنوان ژورنال: The Annals of Mathematics
سال: 1997
ISSN: 0003-486X
DOI: 10.2307/2951827