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Abstract

We establish an inequality relating the surface gravity and topology of a horizon in a $3$-dimensional asymptotically locally hyperbolic static space with the geometry at infinity. Equality is achieved only by the Kottler black holes, and this rigidity leads to several new static black hole uniqueness theorems for a negative cosmological constant. First, the ADS-Schwarzschild black hole with critical surface gravity $\kappa=\sqrt{-\Lambda}$ is unique. Second, the toroidal Kottler black holes are unique in the absence of spherical horizons. Third, the hyperbolic Kottler black holes with mass $m>0$ are unique *if* the generalized Penrose inequality holds for the corresponding class of static spaces. Building on work of Ge-Wang-Wu-Xia, we then use this fact to obtain uniqueness for static ALH graphs with hyperbolic infinities. This inequality follows from a generalization of the Minkowski inequality in ADS-Schwarzschild space due to Brendle-Hung-Wang. Using optimal coefficients for the sub-static Heintze-Karcher inequality, we construct a new monotone quantity under inverse mean curvature flow (IMCF) in static spaces with ${\Lambda} < 0$. Another fundamental tool developed in this paper is a regularity theorem for IMCF in asymptotically locally hyperbolic manifolds. Specifically, we prove that a weak solution of IMCF in an ALH 3-manifold with horizon boundary is eventually smooth. This extends the regularity theorem for a spherical infinity due to Shi and Zhu.