XahLee.org — a intellectual excursion in math, programing, visual arts, and humanities. Math reference works, programing tutorials, photo galleries, social commentaries, classical literature collection.
XahLee.org is visited by 6 thousand visitors per day. The following are major entry points by topic. There are over 3 thousand pages written in the span of 15 years. Use the search box to find articles of interest.
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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 Geometry: Requirements for a Visualization 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. Over 1k articles. Most popular projects are:
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 ◇ 西游记 ◇ Alice in Wonderland ◇ Jonathan Swift ◇ Shakespeare ◇ Bertrand Russell ◇ George Orwell ◇ H G Wells ◇ Marquis de Sade … (20+ fictions and non-fictions).
5k words with usage examples.
Essays on English, writing, style, linguistics.
Social, commentary (≈150 essays)
humor (≈60)
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.
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