Kr-Free Uniquely Vertex Colorable Graphs with Minimum Possible Edges
Kr-Free Uniquely Vertex Colorable Graphs with Minimum Possible Edges
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具有最小可能边的无 Kr 独特顶点可着色图
DOI:
10.1006/jctb.2000.2028
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发表时间:
2001
期刊:
影响因子:
--
通讯作者:
S. Sadjad
中科院分区:
文献类型:
--
作者:
S. Akbari;V. Mirrokni;S. Sadjad
We construct counterexamples to the conjecture of Xu (1990, J. Combin. Theory Ser. B50, 319?320) that every uniquely r-colorable graph of order n with exactly (r?1)n?(r2) edges must contain a Kr.