Bounds for the first eigenvalue of the horizontal Laplacian in positively curved sub-Riemannian manifolds

Pseudo-Hermitian structures on a real hypersurface

S. M. Webster · Journal of Differential Geometry · 1978 · 557 citations · Full text

Natural Sciences, Materials Science, Topology +11

The first eigenvalue of a sublaplacian on a pseudohermitian manifold

Allan Greenleaf · Communications in Partial Differential Equations · 1985 · 85 citations

Natural Sciences, Orthodontics, Geodesy +3

The sharp lower bound for the first positive eigenvalue of the sublaplacian on a pseudohermitian 3-manifold

Hung-Lin-Chiu · Annals of Global Analysis and Geometry · 2006 · 49 citations

Natural Sciences, Geophysics, Subsurface Fluid Flow +6

The sharp lower bound for the first positive eigenvalue of a sub-Laplacian on a pseudo-Hermitian manifold

Song-Ying Li, Hing-Sun Luk · Proceedings of the American Mathematical Society · 2003 · 42 citations · Full text

Natural Sciences, Geophysics, Finite Element Analysis +13

Curvature-dimension inequalities and Ricci lower bounds for sub-Riemannian manifolds with transverse symmetries

Fabrice Baudoin, Nicola Garofalo · Journal of the European Mathematical Society · 2016 · 33 citations · Full text

Natural Sciences, Physics, Descriptive Geometry +13