Hörmander-Type Theorem for Itô Processes and Related Backward SPDEs
arXiv:1412.5481
Abstract
A Hörmander-type theorem is established for Itô processes and related backward stochastic partial differential equations (BSPDEs). A short self-contained proof is also provided for the -theory of linear, possibly degenerate BSPDEs, in which new gradient estimates are obtained.
15 pages