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On 3-colorings of Plane Graphs
Acta Mathematicae Applicatae Sinica, English Series, 2004The main result of the paper states that any \(3\)-colouring of the vertices of a face of degree at least \(11\) in a planar graph \(G\) without cycles of length \(4\), \(5\) and \(7\) and with no pair of intersecting triangles (i.e. every two 3-cycles of \(G\) are vertex-disjoint) can be extended to a \(3\)-colouring of the whole graph \(G\).
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Advances and Applications in Discrete Mathematics, 2020
Ashkenazi, Yehuda, Busharyan, Ruth
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Ashkenazi, Yehuda, Busharyan, Ruth
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