XahLee.org — a intellectual excursion in math, programing, visual arts, and humanities. Math reference works, programing tutorials, photo galleries, social commentaries, classical literature collection. Beauty.
XahLee.org has 4230 html pages and is visited by 7 thousand visitors per day. The following are major entry points by topic. Use search box at bottom to find articles of interest.
Additions are announced in one of the following blogs: Programing, Emacs, Web Dev, Math, Second Life, Arts, Sex, and everything else at Misc Blog. Please Subscribe!
A dictionary of plane curves, with history, definition, formulas, and properties. Heavily enhanced with illustrations, video animations, GeoGebra interactive applet, and Mathematica notebooks. (70+ pages)
60+ surfaces in mostly differential geometry and 30+ minimal surfaces. Moebius strip, klein bottle, cross-cap, pseudosphere, hyperboloid, minimal surfaces... (70+ pages)
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 2020.
A annotated listing of 100+ excellent recreational math programs. You'll find polyhedra & Rubic cubes, curves & surfaces, fractals & L-systems, tilings & symmetry, game of hex & game of life, go & five-in-a-row, peg solitare & polyominos ,...
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:
Netiquette Anthropology (20 essays on hacker's online culture)
A travelog on the city Las Vegas.
Report on a city of capitalistic entertainment, with sordid tales by the standards of righteous men. 200+ photos plus a focus on ethology, Greek mythology, and a close encounter with a prostitute.
A photo exhibition of architectural beauties. Temples, Cathedrals, Castles, polyhedral domes, gargantuan whirling blades... (150+ photos)
A collection of drawings and paintings, from classic masters to contemporary artists and student's work, and erotica too! (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.
This annotated photo exhibition exhibits flags as artifacts, in particular, capturing the Star Spangling phenomenon. (600+ photos)

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).
5000 words with usage examples.
30+ essays on English, English writing, linguistics.
For contact and personal info about me, see: Concise Profile of Xah Lee. I'm available for consultant work. For small to medium website projects, odd research work, tech writing, please contact me.