The strong thirteen spheres problem

Details The strong thirteen spheres problem The strong thirteen spheres problem

2010-02-07

arxiv.org/abs/1002.1439v3

Mathematics

Metric Geometry

Modified lemma 2, 16 pages, 12 figures. Uploaded program package

Scientific paper

The thirteen spheres problem is asking if 13 equal size nonoverlapping spheres in three dimensions can touch another sphere of the same size. This problem was the subject of the famous discussion between Isaac Newton and David Gregory in 1694. The problem was solved by Schutte and van der Waerden only in 1953. A natural extension of this problem is the strong thirteen spheres problem (or the Tammes problem for 13 points) which asks to find an arrangement and the maximum radius of 13 equal size nonoverlapping spheres touching the unit sphere. In the paper we give a solution of this long-standing open problem in geometry. Our computer-assisted proof is based on a enumeration of the so-called irreducible graphs.

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