Unsolved Problem 23:
How should you locate 13 cities on a spherical planet
so that the minimum distance between any two of them is
as large as possible?
Thirteen Points on a Sphere
- [Meschkowski 1966]
- Herbert Meschkowski,
Unsolved and Unsolvable Problems in Geometry.
Frederick Ungar Publishing Co. New York: 1966.
Each week, for your edification, we publish a well-known
unsolved mathematics problem. These postings are intended
to inform you of some of the difficult, yet
interesting, problems that mathematicians
are investigating. We do not suggest that you tackle these problems,
since mathematicians have been unsuccessfully working on these
problems for many years.