(thing) by artemis entreri Fri Feb 09 2001 at 21:33:12
In combinatorics, a cross polytope is a regular polytope, with the convex hull of the points formed by permuting the coordinates of (1,0,0,,...,0) and (-1,0,0,,...,0). In three dimensions, this is the octahedron.

--back to combinatorics--
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