Hypoelliptic estimates and spectral theory for Fokker-Planck operators and Witten Laplacians /
Bernard Helffer, Francis Nier .
- Berlin ; New York : Springer, c2005.
- x, 209 p. : ill. ;
- Lecture notes in mathematics, 1862 0075-8434 ; .
3540242007
Hypoelliptic operators. Spectral theory (Mathematics)