Robert Manson Sawko, Malgorzata Zimon
SIAM/ASA JUQ
Paper
Total unimodularity and combinatorial theorems
Abstract
It is shown how a wide variety of transversal theorems can be given a common proof. The proof depends on a certain matrix being totally unimodular, and it is shown that total unimodularity is needed for the theorem to hold. © 1976.
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