A. P. Sadovskii, “Conditions for the problem of the center and focus to arise for an <nobr>$A_3$</nobr>-system”, Differ. Uravn., 1990, Volume 26, Number 10,Pages <nobr>1743

JOURNALS // Differentsial'nye Uravneniya // Archive

Differ. Uravn., 1990 Volume 26, Number 10, Pages 1743–1753 (Mi de7299)

Ordinary Differential Equations

Conditions for the problem of the center and focus to arise for an $A_3$-system

A. P. Sadovskii

Yanka Kupala State University of Grodno

UDC: 517.925.41

Received: 16.06.1989

Fulltext: PDF file (1087 kB)

English version: Differential Equations, 1990, 26:10, 1293–1302

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