Title
The Thirteen Spheres: A New Proof
Abstract
The “thirteen spheres problem,” also known as the “Gregory–Newton problem,” is to determine the maximum number of three-dimensional spheres that can simultaneously touch a given sphere, where all the spheres have the same radius. The history of the problem goes back to a disagreement between Isaac Newton and David Gregory in 1694. Using a combination of harmonic analysis and linear programming it can be shown that the maximum cannot exceed 13, but in fact 13 is impossible. The standard proof that the maximum is 12 uses an ad hoc construction that does not appear to extend to higher dimensions. In this paper we describe a new proof that uses linear programming bounds and properties of spherical Delaunay triangulations.
Year
DOI
Venue
2004
10.1007/s00454-003-0819-2
Discrete & Computational Geometry
Keywords
Field
DocType
Harmonic Analysis,High Dimension,Delaunay Triangulation,Standard Proof,Sphere Problem
Topology,Combinatorics,Harmonic analysis,SPHERES,Linear programming,Mathematics,Delaunay triangulation
Journal
Volume
Issue
ISSN
31
4
0179-5376
Citations 
PageRank 
References 
7
1.96
3
Authors
1
Name
Order
Citations
PageRank
Kurt M. Anstreicher163386.40