\(QS5_{1}^{(1I)}\)
Description
Phase Portrait
Topological Invariants
| TCSP | Fin Sep | Inf Sep |
|---|---|---|
| \(5\) | \(4320\) | \(111110\) |
Example
The quadratic differential system
\[
\begin{cases}
\dot{x} = P_x(x,y) \\
\dot{y} = P_y(x,y)
\end{cases}
\]
has the following phase portrait done with P4.
The phase portrait appears in the following papers
- With name \(Fig 5.140 U^1_{I,20}\) in {J. C. Artés, J. Llibre and A. C. Rezende}, Structurally unstable quadratic vector fields of codimension one, Birkh "auser/Springer, Cham, 2018, vi+267 pp.