PlanetMath entries are written in LaTeX, the lingua franca of the worldwide mathematics community. All of the entries are automatically cross-referenced with each other, and the entire corpus is kept updated in real-time.

In addition to the mathematics encyclopedia, there are books, expositions, papers, and forums. You also might want to check out encyclopedia requests if you'd like to see something we don't have. We also have the encyclopedia available in offline-browsable snapshot form, and in book form. Also see PlanetMath-exclusive feature articles and topics.

Top starting points:  PlanetMath Overview - High School Mathematics - Calculus - Statistics - Real Numbers - (more)

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