Browsing Combinatorics and Optimization by Subject "acyclic colouring"
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Acyclic Colouring of Graphs on Surfaces
(University of Waterloo, 2018-09-04)An acyclic k-colouring of a graph G is a proper k-colouring of G with no bichromatic cycles. In 1979, Borodin proved that planar graphs are acyclically 5-colourable, an analog of the Four Colour Theorem. Kawarabayashi and ...