\(QS11_{7}^{(2)}\)

Description

Topological configuration of singularities: \(s,s,a,a;N,(0,2)SN\)

Phase Portrait

Phase Portrait Graphic Design

Topological Invariants

TCSPFin SepInf Sep
\(11\)\(4421\)\(2221\)

Example

The quadratic differential system

\[\begin{cases} \dot{x} = -x/20 + x^{2} - (19 \, x \, y)/100 \\ \dot{y} = 2 \, x^{2} + y - 3 \, x \, y + (181 \, y^{2})/100 \end{cases}\]

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