The positive mass conjecture for asymptotically hyperbolic manifolds with boundary

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Let (M,g,Σ)(M,g,\Sigma) be an asymptotically hyperbolic manifold with scalar curvature RgR_g and boundary mean curvature HgH_g satisfying

Rg≥−n(n−1),Hg≥0.R_g\geq -n(n-1),\qquad H_g\geq 0.

For any admissible chart FF, let P[F]\mathcal P^{[F]} be the mass vector, regarded in the Lorentzian space associated with the isometry group of (H+n,b,∂H+n)(\mathbb H^n_+,b,\partial\mathbb H^n_+). Positive mass conjecture. For every admissible chart FF, the vector P[F]\mathcal P^{[F]} is time-like and future directed, unless it vanishes and (M,g,Σ)(M,g,\Sigma) is isometric to (H+n,b,∂H+n)(\mathbb H^n_+,b,\partial\mathbb H^n_+).

This conjecture is the asymptotically hyperbolic analogue of the positive mass statement, with the hyperbolic half-space as the reference geometry and rigidity at zero mass. The supplied text does not state whether the conjecture has been resolved.

References

Primary source

Sergio Almaraz and Levi Lopes de Lima, “The mass of an asymptotically hyperbolic manifold with a noncompact boundary”, arXiv:1811.06913 (2019).

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