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KEV (обсуждение | вклад) Нет описания правки |
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A '''block duplicate graph''' ('''BD-graph''') is a [[graph, undirected graph, nonoriented graph|graph]] obtained by | A '''block duplicate graph''' ('''BD-graph''') is a [[graph, undirected graph, nonoriented graph|graph]] obtained by | ||
adding zero or more ''[[true twins]]'' to each [[vertex]] of a ''[[block graph]]'' (or equivalently to each ''[[cut-vertex]]'', since adding a true | adding zero or more ''[[true twins]]'' to each [[vertex]] of a ''[[block graph]]'' (or equivalently to each ''[[cutvertex|cut-vertex]]'', since adding a true | ||
twin to a non-cut vertex preserves the property of being a block | twin to a non-cut vertex preserves the property of being a block | ||
graph). | graph). |