scientific article; zbMATH DE number 1145252

zbMath0899.34019MaRDI QIDQ4384539

Qi-Gui Yang

Publication date: 5 August 1998

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

zbMATH Keywords

existenceclosed orbits

Mathematics Subject Classification ID

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