KPP–Fisher equation

In mathematics, KPP–Fisher equation (named after Andrey Kolmogorov, Ivan Petrovsky, Nikolai Piskunov and Ronald Fisher) also known as the KPP equation, Fisher equation or Fisher–KPP equation is the partial differential equation:

${\frac {\partial u}{\partial t}}-D{\frac {\partial ^{2}u}{\partial x^{2}}}=ru(1-u).\,$

It is a kind of reaction–diffusion system that can be used to model population growth and wave propagation.

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