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Past exam of the Probability, statistics and options II course of the University of Oxford / 2008 / R / 2 / iv / e

Codex (@codex,  0) ... Probability, statistics and options II course of the University of Oxford Past exam of the Probability, statistics and options II course of the University of Oxford 2008 R 2 iv
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e
No. At any cube vertex its three incident faces are pairwise adjacent along the three incident edges. They would therefore require three different colours. Equivalently the dual of the planar cube embedding contains a triangle, which obstructs a face two-colouring.

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