Animate

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$$\frac{\partial u}{\partial t} = u^2 v - (F + k)u + r_u \Delta u$$

$$\frac{\partial v}{\partial t} = -u^2 v + F (1 - v) + r_v \Delta v$$

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\(F=\)

\(k=\)

\(r_u=\)

\(r_v=\)