Assertion: graph's vertex | /r/HasProperty | set as g. a k-factor of a graph
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Source sentences:
text: In graph theory, a factor of a graph G is a spanning subgraph, i.e., a subgraph that has the same vertex set as G. A k-factor of a graph is a spanning k-regular subgraph, and a k-factorization partitions the edges of the graph into disjoint k-factors.