PlanetMath.org is a free online mathematics encyclopedia and repository edited by Nathan Egge and Aaron Krowne. It's designed to fill the gap created by the removal of MathWorld from the web because of copyright problems (summary in FOSN for 11/26/01). To avoid MathWorld's fate, Egge and Krowne protect the contents of PlanetMath with the GNU Free Document License. (Thanks to Jean-Claude Guedon.)
Posted by
Peter Suber at 8/13/2002 03:22:00 PM.
The open access movement:
Putting peer-reviewed scientific and scholarly literature
on the internet. Making it available free of charge and
free of most copyright and licensing restrictions.
Removing the barriers to serious research.