A NOTE ON THE 4-VALUED PROPOSITIONAL CALCULUS AND THE FOUR COLOUR PROBLEM

SHIH-HUA HOO(1);CHIANG-YE

Acta Mathematica Sinica, Chinese Series ›› 1951, Vol. 1 ›› Issue (3) : 243-246.

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中国科学院数学与系统科学研究院期刊网
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Acta Mathematica Sinica, Chinese Series ›› 1951, Vol. 1 ›› Issue (3) : 243-246. DOI: 10.12386/A1951sxxb0011
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A NOTE ON THE 4-VALUED PROPOSITIONAL CALCULUS AND THE FOUR COLOUR PROBLEM

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{{article.zuoZheEn_L}}. {{article.title_en}}. Acta Mathematica Sinica, Chinese Series, 1951, 1(3): 243-246 https://doi.org/10.12386/A1951sxxb0011

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