Curvature-dimension inequalities on sub-Riemannian manifolds obtained from Riemannian foliations: Part II
by Erlend Grong and Anton Thalmaier

Using the curvature-dimension inequality proved in Part I, we look at consequences of this inequality in terms of the interaction between the sub-Riemannian geometry and the heat semigroup Pt corresponding to the sub-Laplacian. We give bounds for the gradient, entropy, a Poincaré inequality and a Li-Yau type inequality. These results require that the gradient of Ptf remains uniformly bounded whenever the gradient of f is bounded and we give several sufficient conditions for this to hold.

Math. Zeitschrift  282 (2016) 131-164

The paper is available here:

Erlend Grong
Anton Thalmaier

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