Pulling back stability with applications to Out($F_n$) and relatively   hyperbolic groups
  We prove that stability -- a strong quasiconvexity property -- pulls back under proper actions on proper metric spaces. This result has several applications, including that convex cocompact subgroups of both mapping class groups and outer automorphism groups of free groups are stable. We also characterize stability in relatively hyperbolic groups whose parabolic subgroups have linear divergence. 
Tarik Aougab, Matthew Gentry Durham, Samuel J. Taylor
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