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Unimodular arrays

✍ Scribed by E Berlekamp

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 401 KB
Volume: 39
Category: Article
ISSN: 0898-1221
DOI: 10.1016/s0898-1221(00)00111-5

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A chordal graph is called restricted unimodular if each cycle of its vertex-clique incidence bipartite graph has length divisible by 4. We characterize these graphs within all chordal graphs by forbidden induced subgraphs, by minimal relative separators, and in other ways. We show how to construct t