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Minor clarification.
Joseph O'Rourke
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There is considerable literature on this question, and closely related variations. See:

  • The Thompson problem: Which configurations of $n$ electrons on a sphere minimize the electrostatic potential energy?
  • The Tammes problem: Which configurations of $n$ points on a sphere maximizes the smallest distance between any two points? Sometimes phrased as packing $n$ congruent circles on a sphere:

          ![DiskPacking][1]
          (Image from [Paul Sutcliffe](http://www.maths.dur.ac.uk/~dma0pms/my-projects/proj4_1213.html).)
Joseph O'Rourke
  • 150.9k
  • 36
  • 358
  • 958