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The adjacent vertex distinguishing total chromatic number. (English) Zbl 1245.05042
Summary: A well-studied concept is that of the total chromatic number. A proper total colouring of a graph is a colouring of both vertices and edges so that every pair of adjacent vertices receive different colours, every pair of adjacent edges receive different colours and every vertex and incident edge receive different colours. This paper considers a strengthening of this condition and examines the minimum number of colours required for a total colouring with the additional property that for any adjacent vertices \(u\) and \(v\), the set of colours incident to u is different from the set of colours incident to \(v\). It is shown that there is a constant \(C\) so that for any graph \(G\), there exists such a colouring using at most \(\Delta (G)+C\) colours.

MSC:
05C15 Coloring of graphs and hypergraphs
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