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Meaning of stereographic projection

ster'eograph'ic projec'tion

Pronunciation: [key]
— Math. Math.
  1. a one-to-one correspondence between the points on a sphere and the extended complex plane where the north pole on the sphere corresponds to the point at infinity of the plane. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.