Harary, Frank Changing and unchanging invariants for graphs. (English) Zbl 0512.05035 Bull. Malays. Math. Soc., II. Ser. 5, 73-78 (1982). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 5 Documents MSC: 05C35 Extremal problems in graph theory 05-02 Research exposition (monographs, survey articles) pertaining to combinatorics 05C15 Coloring of graphs and hypergraphs Keywords:changing invariant; Petersen graph; chromatic number PDF BibTeX XML Cite \textit{F. Harary}, Bull. Malays. Math. Soc., II. Ser. 5, 73--78 (1982; Zbl 0512.05035) OpenURL