No label defined (Q3447376)
From MaRDI portal
scientific article
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | No label defined |
scientific article |
Statements
28 June 2007
0 references
analytic hypoellipticity
0 references
sums of squares
0 references
Heisenberg group
0 references
d'Alambert operator
0 references
