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arXiv · 1712.04736

Partially CAT(-1) groups are acylindrically hyperbolic

Anthony Genevois·Arnaud Stocker
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Abstract

In this paper, we show that, if a group $G$ acts geometrically on a geodesically complete CAT(0) space $X$ which contains at least one point with a CAT(-1) neighborhood, then $G$ must be either virtually cyclic or acylindrically hyperbolic. As a consequence, the fundamental group of a compact Riemannian manifold whose sectional curvature is nonpositive everywhere and negative in at least one point is either virtually cyclic or acylindrically hyperbolic. This statement provides a precise interpretation of an idea expressed by Gromov in his paper Asymptotic invariants of infinite groups.

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Anthony Genevois, Arnaud Stocker. 2017-12-13. Partially CAT(-1) groups are acylindrically hyperbolic. https://arxiv.org/abs/1712.04736

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