Columbia subject headings:
Definite integrals.
Differential equations, Hypoelliptic.
Laplacian operator.
Orbit method.
Harvard subject headings:
Definite integrals.
Differential equations, Hypoelliptic.
Laplacian operator.
Orbit method.
Princeton subject headings:
Definite integrals.
Differential equations, Hypoelliptic.
Laplacian operator.
Orbit method.