Tammes problem
In geometry, the Tammes problem is a problem in packing a given number of points on the surface of a sphere such that the minimum distance between points is maximized. It is named after the Dutch botanist Pieter Merkus Lambertus Tammes (the nephew of pioneering botanist Jantina Tammes) who posed the problem in his 1930 doctoral dissertation on the distribution of pores on pollen grains.[1] Mathematicians independent of Tammes began studying circle packing on the sphere in the early 1940s; it was not until twenty years later that the problem became associated with his name.[citation needed]
It can be viewed as a particular special case of the
Coulomb force of electrons in a spherical arrangement.[2] Thus far, solutions have been proven only for small numbers of circles: 3 through 14, and 24.[3] There are conjectured solutions for many other cases, including those in higher dimensions.[4]
See also
- Spherical code
- Kissing number problem
- Cylinder sphere packings
References
- ^ Pieter Merkus Lambertus Tammes (1930): On the number and arrangements of the places of exit on the surface of pollen-grains, University of Groningen
- ^ Batagelj, Vladimir; Plestenjak, Bor. "Optimal arrangements of n points on a sphere and in a circle" (PDF). IMFM/TCS. Archived from the original (PDF) on 25 June 2018.
- S2CID 39429109.
- ^ Sloane, N. J. A. "Spherical Codes: Nice arrangements of points on a sphere in various dimensions".
Bibliography
- Journal articles
- Tarnai T; Gáspár Zs (1987). "Multi-symmetric close packings of equal spheres on the spherical surface". Acta Crystallographica. A43 (5): 612–616. .
- Erber T, Hockney GM (1991). "Equilibrium configurations of N equal charges on a sphere" (PDF). Journal of Physics A: Mathematical and General. 24 (23): Ll369–Ll377. S2CID 122561279.
- Melissen JBM (1998). "How Different Can Colours Be? Maximum Separation of Points on a Spherical Octant". S2CID 122700006.
- Bruinsma RF, Gelbart WM, Reguera D, Rudnick J, S2CID 1353095. Archived from the original(PDF) on 2007-09-15.
- Books
- Aste T, Weaire DL (2000). ISBN 978-0-7503-0648-5.
- Wells D (1991). The Penguin Dictionary of Curious and Interesting Geometry. New York: Penguin Books. pp. 31. ISBN 0-14-011813-6.