This is the system $ $ \frac{dA}{dt}=A(2-\frac{A}{5000}-\frac{L}{100})$ $ $ $ \frac{dL}{dt}=L(-\frac{1}{2}+\frac{A}{10000})$ $ And this happens when I use Mathematica: StreamPlot[{2 A (1 – .0001 A) – .01 A L, -.5 L + .0001 A L}, {A, -500, 12000}, {L, -500, 5000}] Note that I need the range of $ A$ and $ L$ as writtenRead more