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A spectral characterization of the H(r)-torus by the first stability eigenvalue

2004/09/16 by Luis J. Alías, Luis J. Alı́as, Abdênago Barros +1 · 6 citations
Mathematics · #Geometric Analysis and Curvature Flows #Geometry and complex manifolds #Geometric and Algebraic Topology

paper · pdf · doi:10.1090/s0002-9939-04-07559-8

Abstract

Let M be a compact hypersurface with constant mean curvature immersed into the unit Euclidean sphere \mathbb Sn+1. In this paper we derive a sharp upper bound for the first eigenvalue of the stability operator of M in terms of the mean curvature and the length of the total umbilicity tensor of the hypersurface. Moreover, we prove that this bound is achieved only for the so-called H(r)-tori in \mathbb Sn+1, with r2≤ (n-1)/n. This extends to the case of constant mean curvature hypersurfaces previous results given by Wu (1993) and Perdomo (2002) for minimal hypersurfaces.

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