scientific article

zbMath0534.34033MaRDI QIDQ3317393

Chengzhi Li

Publication date: 1983

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

limit cyclesingular pointcentreplanar quadratic systemcritical focus

Mathematics Subject Classification ID

Topological structure of integral curves, singular points, limit cycles of ordinary differential equations (34C05)

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