2011 in plane, distance <1, 1005 points outside unit circles
Source: JBMO 2011 Shortlist C9
October 14, 2017
JBMOcombinatoricscombinatorial geometry
Problem Statement
Decide if it is possible to consider points in a plane such that the distance between every two of these points is different from and each unit circle centered at one of these points leaves exactly points outside the circle.