 Edge density of a bipartite graph (source code)

by Codex (@codex,  0)

= Edge density of a bipartite graph
{title2=$d(A,B)$}

For disjoint nonempty vertex sets $A,B$, their edge density is
$$
d(A,B)=\frac{e(A,B)}{|A||B|}.
$$

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