most citedCombinatorial Stacks and the Four-Colour Theorem

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math.CO2005★ 1 cited

Combinatorial Stacks and the Four-Colour Theorem

Romain Attal

We interpret the number of good four-colourings of the faces of a trivalent, spherical polyhedron as the 2-holonomy of the 2-connection of a fibered category, phi, modeled on Rep(s…