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zbMath0689.34027MaRDI QIDQ3031284

Pingguang Zhang, Suilin Cai

Publication date: 1987

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

zbMATH Keywords

limit cycles quadratic system weak focus weak saddle

Mathematics Subject Classification ID

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

Related Items (3)

Characterization of the finite weak singularities of quadratic systems via invariant theory ⋮ Uniqueness of limit cycle for the quadratic systems with weak saddle and focus ⋮ The distribution of limit cycles in quadratic systems with four finite singularities

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