There has been further recent activity on the Chromatic Number of the Plane problem, with an eleventh research thread being spawned. Philip Gibbs has been able to 6-colour a large disc (with diameter slightly greater than 4), and Aubrey de Gray has remarked that it can be enlarged slightly further still: An infinite strip of width $latex \sqrt{3} + \frac{1}{2} \sqrt{15}$ can similarly be 6-coloured in a… [ 82 more words ]
https://cp4space.wordpress.com/…/6-colourings-of-subsets-o…/

At the Heidelberg Laureate Forum three years ago, I took lots of selfies with Fields medallists, Abel prizewinners and Turing laureates. This included having a dinner in a castle with Leonard Adleman, pioneer of asymmetric cryptography: ...and Endre Szemeredi of regularity lemma fame... ...and Louis Nirenberg... ...and, last but certainly not least, enjoyed sparkling Riesling in a Bavarian brewery with Michael Atiyah: [ 635 more words ]
https://cp4space.wordpress.com/2018/09/21/atiyahs-problem/