First stability eigenvalue characterization of CMC Hopf tori into Riemannian Killing submersions

preprint2013arXivOpen access

Abstract

We find out upper bounds for the first eigenvalue of the stability operator for compact constant mean curvature orientable surfaces immersed in a Riemannian Killing submersion. As a consequence, the strong stability of such surfaces is studied. We also characterize constant mean curvature Hopf tori as the only ones attaining the bound in certain cases.

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