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Paper detail

Graham's Number is Less Than 2^^^6

In [5] Graham and Rothschild consider a geometric Ramsey problem: finding the least n such that if all edges of the complete graph on the points {+1,-1}^n are 2-colored, there exist 4 coplanar points such that the 6 edges between them are monochromatic. They give an explicit upper bound: F(F(F(F(F(F(F(12))))))), where F(m) = 2^^(m)^^3, an extremely fast-growing function. By reducing the problem to a variant of the Hales-Jewett problem, we find an upper bound which is between F(4) and F(5).

preprint2013arXivOpen access
Mikhail LavrovMitchell LeeJohn Mackey
math.CO
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Mikhail LavrovMitchell LeeJohn Mackey

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