This is an Open Thread / Coffee Hour and all topics of conversation are welcome. Today's suggested topic is the Stereographic Projection.
From Wikipedia: Illustration by Rubens for "Opticorum libri sex philosophis juxta ac mathematicis utiles", by François d'Aiguillon. - What is for dinner? How are you doing? What is on your mind. If you are new to Street Prophets please introduce yourself beyond the fold in a comment. This is an Open Thread / Coffee Hour and all topics of conversation are welcome. Today's Coffee Hour is brought to you by Stereographic Projection.
The stereographic projection, in geometry, is a particular mapping (function) that projects a sphere onto a plane. The projection is defined on the entire sphere, except at one point — the projection point. Where it is defined, the mapping is smooth and bijective. It is conformal, meaning that it preserves angles. It is neither isometric nor area-preserving: that is, it preserves neither distances nor the areas of figures. From Wikipedia, the free encyclopedia: Stereographic Projection