Ann. Inst. H. Poincaré Probab. Statist. 56, no. 1 (2020), 612-636
ISSN:
0246-0203
DOI:
10.1214/19-aihp975
Popis:
We study gradient bounds and other functional inequalities for the diffusion semigroup generated by Kolmogorov type operators. The focus is on two different methods: coupling techniques and generalized $\Gamma$-calculus techniques. The advantages and drawbacks of each of these methods are discussed. Comment: 30 pages