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On the residual finiteness of outer automorphisms of relatively hyperbolic groups

V. Metaftsis·M. Sykiotis
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Abstract

We show that every virtually torsion-free subgroup of the outer automorphism group of a conjugacy separable relatively hyperbolic group is residually finite. As a direct consequence, we obtain that the outer automorphism group of a limit group is residually finite.

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V. Metaftsis, M. Sykiotis. 2009-07-29. On the residual finiteness of outer automorphisms of relatively hyperbolic groups. https://arxiv.org/abs/math/0608685

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