%0 Journal Article
%T Test elements in torsion-free hyperbolic groups
%A Daniel Groves
%J Mathematics
%D 2012
%I arXiv
%X We prove that in a torsion-free hyperbolic group, an element is a test element if and only if it is not contained in a proper retract.
%U http://arxiv.org/abs/1202.3939v2