Columbia subject headings:
Differential equations, Hypoelliptic--Congresses.
Diffusion processes--Congresses.
Geometry, Riemannian--Congresses.
Harvard subject headings:
Differential equations, Hypoelliptic--Congresses
Diffusion processes--Congresses.
Geometry, Riemannian--Congresses.
Princeton subject headings:
Diffusion processes.
Geodesics (Mathematics)
Geometry, Riemannian.