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bio website shapetales.wordpress.com
location Prague, Czech Republic
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Math PhD. student and functional programming enthusiast


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comment Can somebody provide some sort of crash course on random walk and its problems at the level of a beginning undergraduate student in physics?
@sunspots: yes, it's a graph Laplacian for the special case of the graph a square lattice. In this case every vertex has four neighbors, so the matrix $W$ in $\Delta = D - W$ is $1/4$ precisely for the pairs of neighboring vertices and $0$ otherwise. That's precisely what's written in the averaging equation for harmonics above.
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