MathDB
TOT 043 1983 Spring S-A5 coloring of k vertices in regular n-gon

Source:

August 18, 2019
Coloringcombinatoricscombinatorial geometryregular polygon

Problem Statement

kk vertices of a regular nn-gon PP are coloured. A colouring is called almost uniform if for every positive integer mm the following condition is satisfied: If M1M_1 is a set of m consecutive vertices of PP and M2M_2 is another such set then the number of coloured vertices of M1M_1 differs from the number of coloured vertices of M2M_2 at most by 11. Prove that for all positive integers kk and nn (knk \le n) an almost uniform colouring exists and that it is unique within a rotation.
(M Kontsevich, Moscow)