A philosophical essay.
A historical account with links to biographies of some of the people involved.
Seminar notes by Greg Schreiber.
Finding the shortest distance between two points on the earth given latitude and longitude. Downloa...
A bibliographic reference list of books and articles on non-Euclidean geometries, part of the MacTu...
Software simulation offering straightedge and compass constructions in hyperbolic geometry.
Includes a set of supplementary notes that provide an introduction to Minkowskian geometry and a to...