Two-uniqueness of limit cycles encircling three critical points of Liénard’s equation. (Chinese. English summary) Zbl 0776.34023
Summary: The two-uniqueness of limit cycles encircling three critical points of Liénard equation is proved, and some useful results are obtained.
MSC:
| 34C05 | Topological structure of integral curves, singular points, limit cycles of ordinary differential equations |
