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Definitions:

A cut (S, V-S) of an undirected graph G = (V, E) is a partition of V.



\psfig{figure=figures/f17-2.ps}

An edge (u,v) $\in$ E crosses the cut (S, V-S) if u $\in$ S and v $\in$ V-S.



\psfig{figure=figures/f17-3.ps}

(a,b) and (b,d) cross the cut


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