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
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通讯作者:
Ram P. Gupta
Ram P. Gupta
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文献类型:
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作者:
Ram P. Gupta

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本文给出了可补图的色数与消色数之和的精确上界,特别证明了Hedetniemi(1966)的一个猜想,并暗示了Nordhaus和Gaddum(1956)的一个界.
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).