We establish a new lower bound on the first nonzero eigenvalue $\lambda_1 (\theta ) of the sublaplacian $\Delta_b$ on a compact strictly pseudoconvex CR manifold $M$ carrying a contact form $\theta$ whose Tanaka–Webster connection has pseudohermitian Ricci curvature bounded from below.
A lower bound on the spectrum of the sublaplacian
DRAGOMIR, Sorin;
2015-01-01
Abstract
We establish a new lower bound on the first nonzero eigenvalue $\lambda_1 (\theta ) of the sublaplacian $\Delta_b$ on a compact strictly pseudoconvex CR manifold $M$ carrying a contact form $\theta$ whose Tanaka–Webster connection has pseudohermitian Ricci curvature bounded from below.File in questo prodotto:
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