4.6 Article

The Lichnerowicz-Obata theorem for the Kohn Laplacian in three dimensions

Journal

ADVANCES IN MATHEMATICS
Volume 381, Issue -, Pages -

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.aim.2021.107618

Keywords

Kohn Laplacian; Eigenvalue; Rigidity; Pseudohermitian manifold

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Funding

  1. Simons Foundation [524601]
  2. National Science Foundation [DMS-1607091]

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We have proven rigidity for the Lichnerowicz-type eigenvalue estimate for the Kohn Laplacian on strictly pseudoconvex three manifolds with nonnegative CR Paneitz operator and positive Webster curvature. This conditions for this rigidity include the manifold having a nonnegative CR Paneitz operator and positive Webster curvature.
We prove rigidity for the Lichnerowicz-type eigenvalue estimate for the Kohn Laplacian on strictly pseudoconvex three manifolds with nonnegative CR Paneitz operator and positive Webster curvature. (c) 2021 Elsevier Inc. All rights reserved.

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