last modified October 5, 2001
This page is maintained by Dan Archdeacon. Here are links to copies of my recent papers that contain more information about the graphs shown here. You can also e-mail me at dan.archdeacon@uvm.edu, or download my vitae.
The pictures below are postscript files. Some files are in "computer-friendly" formats.
The following three pictures are included here to illustrate stereographic projection, or in the case of the torus, to illustrate the relation between the earth and the pinched sphere (a.k.a the spindle surface). The following citation is required by the copyright holder if one wishes to display them.
"Earthshapes (copyrighted by Litton Systems, Inc.) is a series of 12 hypothetical Earths as conceived by Joe Portney during a flight to the North Pole. As the North Pole was reached, Portney looked on the icy terrain below and mused to himself, "What if the Earth were......?" The results of this imaginative lapse were the Earthshapes. The 12 hypothetical Earths became the theme of a Litton Pilots and Navigators Calendar and was very popular receiving awards and heavy fan mail. Earthshapes was used on the cover of the U.S. Air Force publication The Navigator, displayed at the Los Angeles Central Library, and appeared on TV. The Earthshapes are used in education throughout the world and sold by McGraw Hill Childrens Publications."
