From Encyclopedia of Mathematics
Revision as of 16:59, 7 February 2011 by (talk) (Importing text file)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

The pole of coordinates is the origin in polar coordinates.

A pole is the centre of an inversion.

The pole of the straight line with respect to a conic is the point such that the line is the polar of the point with respect to the conic.


For poles of (analytic) functions see Pole (of a function). Sometimes the word "pole" is used for the point (North pole) or (South pole) of the unit sphere in , with centre at the origin.


[a1] M. Berger, "Geometry" , 1–2 , Springer (1987) (Translated from French)
[a2] H.S.M. Coxeter, "Introduction to geometry" , Wiley (1963)
How to Cite This Entry:
Pole. Encyclopedia of Mathematics. URL:
This article was adapted from an original article by A.B. Ivanov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article