This function projects a point in the plane onto the surface of a Riemann Sphere, the one-point compactification of the complex plane.
この関数は、平面上の点をリーマン球の表面に射影する、つまり複素平面の一つの軸へのコンパクト化 (one-point compactification) を行う。 - JM
Copyright (c) 2001 Robert Kiesling. Copyright (c) 2002, 2003 David Merrill. The contents of this document are licensed under the GNU Free Documentation License. Copyright (C) 1999 JM Project All rights reserved.