Chromatic Problems and Prizes

摘要

We do not need to worry about the chromatic number of the plane problem (CNP) to die any time soon, despite major breakthroughs reported in the Special Issue of Geombinatorics in July 2018. To make these lines selfcontained, let me repeat the definition and the state of the problem in general case. CNP was given birth by the 18-year old teenager Eddie Nelson [S1] in November 1950: