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Chromatic polynomials and logarithmic concavity. (English) Zbl 0268.05104

05C15 Coloring of graphs and hypergraphs
Full Text: DOI
[1] Anderson, I.: On the divisors of a number. J. London math. Soc. 43, 410-418 (1968) · Zbl 0155.37003
[2] S. G. Hoggar, Chromatic polynomials and broken cycles, to appear. · Zbl 0281.05102
[3] Lieb, E. H.: Concavity properties and a generating function for Stirling numbers. J. combinatorial theory ser. B 5, 203-206 (1968) · Zbl 0164.33002
[4] Read, R. C.: An introduction to chromatic polynomials. J. combinatorial theory ser. B 4, 52-71 (1968) · Zbl 0173.26203
[5] Whitney, H.: A logical expansion in mathematics. Bull. amer. Math. soc. 38, 572-579 (1932) · Zbl 0005.14602
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