\(QS11_{17}^{(2)}\)
Description
Phase Portrait
Topological Invariants
| TCSP | Fin Sep | Inf Sep |
|---|---|---|
| \(11\) | \(4421\) | \(3211\) |
Example
The quadratic differential system
\[\begin{cases} \dot{x} = -\frac{1}{10}0 + x^{2} + 2 \, x \, y + (9 \, y^{2})/10 \\ \dot{y} = y + x \, y - y^{2}/2 \end{cases}\]
has the following phase portrait done with P4. If you want, you may download the P4 file here.
The phase portrait appears in the following papers
- With name \(BD49\) in {J. C. Artés}, Systems of class BD, {Preprint} (2026).