- Working Paper
Let F be the free group over a set of two or more generators. In  R. Brooks constructed an infinite family of quasi-morphisms F ! R such that an infinite subfamily gives rise to independent classes in the second bounded cohomology H2 b(F,R), which proves that this space is infinite dimensional, cf. . We give a simpler proof of this fact using a different type of quasi-morphisms. After computing the Gromov norm of the corresponding bounded classes, we generalize our example to obtain quasi-morphisms on free products, as well as quasi-morphisms into groups without small subgroups, also known as "-representations Show more
PublisherCornell University Library
Organisational unit08802 - Iozzi, Alessandra (Tit.-Prof.)
NotesPreprint, Submitted on 23 Nov 2009, last revised 24 Nov 2009.
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