In geometry, close-packing of equal spheres is a dense arrangement of congruent spheres in an infinite, regular arrangement (or lattice). Carl Friedrich...

geometry, a sphere packing is an arrangement of non-overlapping spheres within a containing space. The spheres considered are usually all of identical size...

Random close packing (RCP) of spheres is an empirical parameter used to characterize the maximum volume fraction of solid objects obtained when they are...

Sphere packing in a sphere is a three-dimensional packing problem with the objective of packing a given number of equal spheres inside a unit sphere. It...

this is called sphere packing, which usually deals only with identical spheres. The branch of mathematics generally known as "circle packing" is concerned...

the reals. Bin packing problem Close-packing of equal spheres Conway puzzle Covering problem Cutting stock problem Ellipsoid packing Kissing number problem...

In crystallography, atomic packing factor (APF), packing efficiency, or packing fraction is the fraction of volume in a crystal structure that is occupied...

simultaneously square and triangular Close-packing of equal spheres Darling, David. "Cannonball Problem". The Internet Encyclopedia of Science. Ma, De Gong (1985)...

discount the volume of the void fraction. Sometimes this can be determined by geometrical reasoning. For the close-packing of equal spheres the non-void fraction...

that "Proper use of Zen Magnets and Neoballs creates no exposure to danger whatsoever." As of January 2017, many brands of magnet spheres including Zen Magnets...