Restricted unimodular chordal graph
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Restricted unimodular chordal graph --- ограниченный унимодулярный хордальный граф.
A restricted unimodular (RU) chordal graph is a chordal graph [math]\displaystyle{ G }[/math] such that a vertex-clique incidence bigraph [math]\displaystyle{ VK(G) }[/math] is [math]\displaystyle{ \infty }[/math]-chorded, or equivalently 4-chorded.