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JOURNALS
// Differentsial'nye Uravneniya
// Archive
Differ. Uravn.,
1978
Volume 14,
Number 12,
Pages
2185–2189
(Mi de3572)
Ordinary Differential Equations
Formal transformations and the problem of distinguishing the center and focus
A. P. Sadovskii
V. I. Lenin Belorusskii State University
UDC:
517.925.12
Received:
24.02.1977
Fulltext:
PDF file (358 kB)
Bibliographic databases:
©
Steklov Math. Inst. of RAS
, 2024
Fulltext:
PDF file (358 kB)