Wilf, H. S. The eigenvalues of a graph and its chromatic number. (English) Zbl 0144.45202 J. Lond. Math. Soc. 42, 330-332 (1967). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 55 Documents Keywords:topology PDF BibTeX XML Cite \textit{H. S. Wilf}, J. Lond. Math. Soc. 42, 330--332 (1967; Zbl 0144.45202) Full Text: DOI OpenURL