scientific article

zbMath0691.34021MaRDI QIDQ3032605

Dengqing Cao, Anji Huang

Publication date: 1988

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

zbMATH Keywords

Liénard equationPoincaré-Bendixson annular region

Mathematics Subject Classification ID

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