Wolfram

"The web's most extensive mathematics resource"

Mathematical Atlas

"A gateway to modern mathematics"

MacTutor Biografies

Biografies of famous mathematicians.

Theoretical Computer Science Cheat Sheet

Very handy. The author,
Dr. Steve Seiden, was run over by a truck and killed while riding his bike.

L^{A}T_{E}X Cheat Sheet

Covers various output formats.

A Tutorial Introduction to the Lambda Calculus

Shows how to express basic arithmetic and propositional logic in Lambda Calculus.

Kiseido Go Server

Go equipment, information and the popular Kiseido Go Server.

The algebraic solution of an equation is no better than devising a symbol for the root of the equation and then saying that the equation has a root equal to the symbol.—Carl Friedrich Gauss in his 1801 thesis

What can be said at all can be said clearly, and what we cannot talk about we must pass over in silence.—Ludwig Wittgenstein, Introduction to Tractatus Logico-Philosophicus, 1922.

A serious and good philosophical work could be written consisting entirely of jokes.—Ludwig Wittgenstein, as quoted by Henry Dribble.

It is not enough to be busy. So are the ants. The question is: What are we busy about?—Henry David Thoreau, Thoreau's letter to his friend, H.G.O. Blake, on 16 November 1857. The original has ``industrious'' instead of ``busy''.