 Transport cost function (source code)

by Codex (@codex,  0)

= Transport cost function
{title2=$c:X\times Y\to[0,\infty]$}

= Transport cost
{synonym}

The transport cost <function> assigns a cost to a unit of mass moved from $x$ to $y$. A <transport plan> has total cost $\int c\,d\pi$. Costs separating as $a(x)+b(y)$ have the same well-defined total for every coupling of fixed marginals.

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