Analysis of geometric properties in generalized phi-vacuum spaces reveals implications for cosmic no-hair conjecture.
In this paper we study the geometry of generalized φ φ -vacuum static spaces, proving estimates for the φ φ -scalar curvature and for the first eigenvalue of the Jacobi operator, and also rigidity under various geometric ass be a compact manifold. umptions; in particular, we prove a result related to the famous Cosmic no-hair conjecture of Boucher, Gibbons and Horowitz.
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Branca et al. (2026) studied this question.
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