Some arithmetical restatements of the Four Color Conjecture
The Four Colour Conjecture is reformulated as a statement about non-divisibility of certain binomial coefficients. This reformulation opens a (hypothetical) way of proving the Four Colour Theorem by taking advantage of recent progress in finding closed forms for binomial summations. (C) 2001 Elsevier Science B.V. All rights reserved.
four colours binomial summation planar graphs