Date: Oct 2, 2013 8:30 PM Author: Haran Pilpel Subject: Re: cotpi 69 - Black and white plane quasi <firstname.lastname@example.org> writes:
> Does there exist a 2-coloring of Q^2 such that no two points
> of Q^2 which are 1 unit apart have the same color?
Yes. This is a result of Woodall from 1973. ("Distances realized by sets
covering the plane.")