The placement of points on a sphere so as to minimize the maximum distance of any point on the sphere from the closest one of the points.
Spherical Covering
See also
Spherical Code, Spherical DesignExplore with Wolfram|Alpha
References
Hardin, R. H.; Sloane, N. J. A. S.; and Smith, W. D. Spherical Codes. In preparation. http://www.research.att.com/~njas/coverings/.Referenced on Wolfram|Alpha
Spherical CoveringCite this as:
Weisstein, Eric W. "Spherical Covering." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SphericalCovering.html