RUS
ENG
Full version
JOURNALS
// Differentsial'nye Uravneniya
// Archive
Differ. Uravn.,
1997
Volume 33,
Number 11,
Pages
1516–1522
(Mi de9586)
Ordinary Differential Equations
On the sum of squares of vector fields
N. N. Petrov
Saint Petersburg State University
UDC:
517.97
Received:
25.04.1995
Fulltext:
PDF file (1570 kB)
English version:
Differential Equations, 1997,
33
:11,
1522–1527
Bibliographic databases:
©
Steklov Math. Inst. of RAS
, 2026
Fulltext:
PDF file (1570 kB)