scientific article; zbMATH DE number 3336143

zbMath0212.11402MaRDI QIDQ5613361

G. S. Rychkov

Publication date: 1970

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

Mathematics Subject Classification ID

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

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Maximum number of limit cycles of the equation \((b_{20}x^2 + b_{11} xy + b_{02}y^2 + b_{00} ) dy = (a_{20}x^2 + a_{11} xy + a_{02}y^2 + a_{00} ) dx\) is two ⋮ Uniqueness of limit cycles for Liénard differential equations of degree four ⋮ The qualitative analysis of a class of planar Filippov systems ⋮ On the uniqueness of limit cycles of the equation \(Q_2(x,y)dy=P_2(x,y)dx\)

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