Bounds on the chromatic and achromatic numbers of complimentary graphs
Bounds on the chromatic and achromatic numbers of complimentary graphs
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互补图的色数和消色差数的界限
DOI:
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发表时间:
1968
期刊:
影响因子:
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通讯作者:
Ram P. Gupta
中科院分区:
文献类型:
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作者:
Ram P. Gupta
In the present note, exact upper bounds on the sums of chromatic and achromatic numbers of complimentary graphs are determined Which prove in particular a conjecture by Hedetniemi (1966) and imply a bound due to Nordhaus and Gaddum (1956).