Mathematics – Group Theory
Scientific paper
2007-10-24
Mathematics
Group Theory
21 pages, 1 figure
Scientific paper
We give a cohomological characterization of Gromov relative hyperbolicity. As an application we prove a converse to the combination theorem for graphs of relatively hyperbolic groups given in a previous paper of the first author. We build upon, and follow the ideas of, the work of S. Gersten in ``Cohom. lower bounds for isoperim. funct. on groups'' (Topology 37, 1998) about the same topics in the classical Gromov hyperbolic setting.
Gautero François
Heusener Michael
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