- From the Feb. 1992 issue of Scientific American
- = dimensions for which the answer is known.
REFERENCES (from the Sci. Am. article)
The Problem of the Thirteen Spheres. John Leech in Mathematical Gazette, Vol. 40, No. 331, pages 22-23; February 1956
Sphere Packings, Lattics and Groups. John Horton Conway and Neil J. A. Sloane. Springer-Verlag, 1988.
Sphere Packings and Spherical Geometry--Kepler's Conjecture and Beyond, preprint. Wu-Yi Hsiang. Center for Pure and Applied Mathematics, University of California, Berkeley, July 1991.