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Results tagged with co.combinatorics
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user 83401
Enumerative combinatorics, graph theory, order theory, posets, matroids, designs and other discrete structures. It also includes algebraic, analytic and probabilistic combinatorics.
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Planar triangulations for which all distinct 4-colorings consist of exactly 6 Kempe chains
Are there any internally 6-connected planar triangulations other than the icosahedron all of whose distinct 4-colorings consist of exactly 6 Kempe chains, one for each of the 6 color-pairs?
Addendum: …
- 91
6
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Chromatic numbers for coloring-constrained graphs
I am interested in any and all articles about chromatic numbers applying to constrained colorings of a graph. For example, if a graph must be (properly) colored so that there is a 2-color path betwee …
- 91