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On the join of graphs and chromatic uniqueness. (English) Zbl 0819.05027
Let $$U_{n+1}$$ denote the graph obtained from the wheel $$K_ 1+ C_ n$$ by deleting a spoke, where $$+$$ denotes the join of graphs. The author shows that, for any $$m\geq 1$$ and odd $$n\geq 3$$, the graph $$K_ m+ U_{n+1}$$ is chromatically unique.

##### MSC:
 05C15 Coloring of graphs and hypergraphs
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##### References:
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