Edge-colouring and total-colouring chordless graphs
Edge-colouring and total-colouring chordless graphs
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DOI:
10.1016/j.disc.2013.03.020
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发表时间:
2013-07
期刊:
影响因子:
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通讯作者:
R. Machado;C. M. Figueiredo;Nicolas Trotignon
中科院分区:
文献类型:
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作者:
R. Machado;C. M. Figueiredo;Nicolas Trotignon
A graph G is chordless if no cycle in G has a chord. In the present work we investigate the chromatic index and total chromatic number of chordless graphs. We describe a known decomposition result for chordless graphs and use it to establish that every chordless graph of maximum degree Δ≥3 has chromatic index Δ and total chromatic number Δ+1. The proofs are algorithmic in the sense that we actually output an optimal colouring of a graph instance in polynomial time.