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zbMath1024.34023MaRDI QIDQ3154148

Pingguang Zhang

Publication date: 14 November 2002

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

zbMATH Keywords

limit cycles quadratic systems second-order weak focus

Mathematics Subject Classification ID

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

Related Items (3)

On the distribution and number of limit cycles for quadratic systems with two foci ⋮ On the number of limit cycles for the quadratic systems with a weak focus and a strong focus ⋮ On the limit cycles of quadratic differential systems.

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