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Rigidity of Poincar\'e-Einstein manifolds with flat Euclidean conformal infinity

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arxiv 2503.06062 v1 pith:X2LQNP6L submitted 2025-03-08 math.DG

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keywords manifoldsconformale-einsteineuclideanpoincarcurvatureflatinfinity
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In this paper, we prove a rigidity theorem for Poincar\'e-Einstein manifolds whose conformal infinity is a flat Euclidean space. The proof relies on analyzing the propagation of curvature tensors over the level sets of an adapted boundary defining function. Additionally, we provide examples of Poincar\'e-Einstein manifolds with non-compact conformal infinities. Furthermore, we draw analogies with Ricci-flat manifolds exhibiting Euclidean volume growth, particularly when the compactified metric has non-negative scalar curvature.

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  1. A sharp relative comparison inequality for conformal fillings of Poincar\'e--Einstein manifolds

    math.DG 2026-07 conditional novelty 8.0 of 10

    For every smooth Poincaré-Einstein filling with positive-Yamabe conformal infinity, the type-I Escobar-Yamabe invariant of the compactification is bounded below by the boundary Yamabe invariant to the power n/(n+1), w...

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