Example: bachelor of science

Minimum Cost Flow - Columbia University

ow around most negative cycle. (NP-hard to nd) {How many iterations would that be? Analysis: {The di erence between any two feasible ows is the union of at most m cycles. {Let f be the current ow, f be the optimal ow. {Consider f f . It is the union of at most m cycles. {The most negative cycle in f f must have cost at least 1 m c(f f).

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