Harnack inequality for SDE with multiplicative noise and extension to Neumann semigroup on nonconvex manifolds
Harnack inequality for SDE with multiplicative noise and extension to Neumann semigroup on nonconvex manifolds
By constructing a coupling with unbounded time-dependent drift, dimension-free Harnack inequalities are established for a large class of stochastic differential equations with multiplicative noise. These inequalities are applied to the study of heat kernel upper bound and contractivity properties of the semigroup. The main results are also extended to reflecting …