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planetmath.org - all language versions

PlanetMath is a free, collaborative, mathematics online encyclopedia. The emphasis is on rigour, openness, pedagogy, real-time content, interlinked content, and also community of about 24,000 people with various maths interests. Intended to be comprehensive, the project is currently hosted by the University of Waterloo. The site is owned by a US-based nonprofit corporation, "PlanetMath.org, Ltd". PlanetMath was started when the popular free online mathematics encyclopedia MathWorld was temporarily taken offline for 12 months by a court injunction as a result of the CRC Press lawsuit against the Wolfram Research company and its employee (and MathWorld's author) Eric Weisstein. More information...

According to PR-model, planetmath.org is ranked 15,155^th in multilingual Wikipedia, in particular this website is ranked 3,711^th in Spanish Wikipedia.

The website is placed before albumism.com and after furinkan.com in the BestRef global ranking of the most important sources of Wikipedia.

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