A dictionary of plane curves, with history, definition, formulas, and properties. Heavily enhanced with illustrations, video animations, GeoGebra interactive applet, and Mathematica notebooks.
This website XahLee.org has 3872 HTML pages, and is visited by 8 thousand visitors per day on average. The following are major entry points by topic. Or, you may use the search box at bottom.
A dictionary of plane curves, with history, definition, formulas, and properties. Heavily enhanced with illustrations, video animations, GeoGebra interactive applet, and Mathematica notebooks.
60+ surfaces in mostly differential geometry and 30+ minimal surfaces. Including: moebius strip, klein bottle, cross-cap, pseudosphere, hyperboloid, minimal surfaces...
A exposition on wallpaper groups, with illustrations of the 17 wallpaper groups and a wallpaper gallery. Technically, the derivation of all discontinuous groups of rotation and translation in the plane. (7+ pages, 100+ illustrations)
A collection of mathematical images. We all know mathematics is beautiful, but did you know that math can appear beautiful too?
Includes two critical essays: Algorithmic Mathematical Art that surveys and defines the subject, and Requirements For A Visualization Software System For 2010.
A annotated listing over one hundred excellent recreational math programs. You'll find programs that do: polyhedra & Rubic cubes, curves & surfaces, fractals & L-systems, tilings & symmetry, game of hex & game of life, go & five-in-a-row, peg solitare & polyominos, ... etc.
Tutorials, Critiques, Commentaries on aspects of the computing industry, technical and social. Siphon my knowledge into your brain; assimilate my sensibilities to your spine. Commence with:
A travelog on the city Las Vegas.
Due to circumstances, i'm visiting and staying in Las Vegas for about 10 days. It is a city of capitalistic entertainment, with of course sordid tales by the standards of righteous men. This report contains over 200 photos plus a focus on ethology, Greek mythology, and a close encounter with a prostitute.
This annotated photo exhibition exhibits flags as artifacts, in particular, capturing the Star Spangling phenomenon. (600+ photos)
A photo exhibition of architectural beauties. Temples, Cathedrals, Castles, polyhedral domes, gargantuan whirling blades... (150+ photos)
Annotated photographic exhibition of beautiful seashells. (28+ seashells, 110+ photos.)
A collection of visual arts. William Bouguereau, M C Escher, Robert Crumb, Osamu Tezuka, Jean Giraud Giro, erotica ... (80+ pages, 360+ images)
A look at the emergent technology of Virtual World. (110+ pages, 500+ images) Includes a 3D-Construction Tutorial, Linden Script Tutorial, and best LSL editor Emacs xlsl-mode.
A Collection of World Literature Classics, with annotations. Arabian Nights, Monkey King, Alice in Wonderland, Jonathan Swift, Shakespeare, Bertrand Russell, George Orwell, H G Wells, Marquis de Sade... (20+ fictions and non-fictions).
And, a Compendium of English Vocabulary, of 5000 words with usage examples.
Essay collection: Ethology, Sexuality, and Lyrics, Language & English.
For contact and personal info about me, see the Personal Info about Xah Lee. I'm available for consultant work. $100/hr.
News of this site is at: Xah Lee's Blog.