Saddle values and integrability conditions of quadratic differential systems

zbMath0659.34051MaRDI QIDQ1112230

De-Ming Zhu

Publication date: 1987

Published in: Chinese Annals of Mathematics. Series B (Search for Journal in Brave)

zbMATH Keywords

Poincaré's methodsaddle valuesweak saddle of quadratic differential system

Mathematics Subject Classification ID

Perturbations of ordinary differential equations (34D10) Bifurcations of limit cycles and periodic orbits in dynamical systems (37G15) Ordinary differential equations and systems on manifolds (34C40) Local and nonlocal bifurcation theory for dynamical systems (37G99)

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On a conjecture on the integrability of Liénard systems ⋮ Homoclinic bifurcation of orbit flip with resonant principal eigenvalues

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