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Re: 4 colors problem
Posted:
Mar 3, 2014 9:19 PM
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it is not solved;
see Hales' website at PU.
the new effort is f.l.y.s.p.e.c.k
necessary condition is, "the tetrahedron (or
its dual, the tetra-asteron, using the "classical graph-
theory approach
we are just working on the suffiency
(use "necessity & sufficiency in common statments
about lunch e.g.
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