Suppose that $p(x,t)$ be population density of some species at time $t$ in position $x$. Then the spatial movement is modeled by the Laplacian with diffusion coefficient $k$. I want to know, why Laplacian came into the picture here?
2026-03-28 17:05:54.1774717554
Why spatial diffusion is modeled by Laplacian?
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