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arxiv: 0911.2808 · v2 · submitted 2009-11-14 · 🧮 math.CO

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Fractional total colourings of graphs of high girth

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classification 🧮 math.CO
keywords deltafractionalgirthtotalchromaticdegreeepsilonexists
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Reed conjectured that for every epsilon>0 and Delta there exists g such that the fractional total chromatic number of a graph with maximum degree Delta and girth at least g is at most Delta+1+epsilon. We prove the conjecture for Delta=3 and for even Delta>=4 in the following stronger form: For each of these values of Delta, there exists g such that the fractional total chromatic number of any graph with maximum degree Delta and girth at least g is equal to Delta+1.

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