The pole of coordinates is the origin in polar coordinates.
A pole is the centre of an inversion.
For poles of (analytic) functions see Pole (of a function). Sometimes the word "pole" is used for the point $(0,0,1)$ (North pole) or $(0,0,-1)$ (South pole) of the unit sphere in $\mathbf R^3$, 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)|
Pole. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Pole&oldid=31960