Date: Dec 6, 2012 5:46 PM
Author: Brian Q. Hutchings
Subject: Re: convex polyhedra with all faces regular

here is the wordproblemma:
one has cartesian (fermatian) or trilinear,
cylindrical or bilinear,
spherical or unilinearcoordinates; or,
they can be known as nonpolar, unipolar & bipolar;
so, what is tripolar or "nonlinear" coordination?