Tag Archives: Aubrey de Grey

Aubrey de Grey: The chromatic number of the plane is at least 5

Posted on April 10, 2018 by Gil Kalai

  A major progress on an old standing beautiful problem. Aubrey de Grey proved that the chromatic number of the plane is at least 5. (I first heard about it from Alon Amit.) The Hadwiger–Nelson problem asks for the minimum number of … Continue reading →

Posted in Combinatorics, Geometry, Open problems, Updates | Tagged , | 11 Comments