PlanetMath
Location
Mission
PlanetMath is a virtual community which aims to help make mathematical knowledge more accessible. PlanetMath's content is created collaboratively: the main feature is the mathematics encyclopedia with entries written and reviewed by members. The entries are contributed under the terms of the GNU Free Documentation License (FDL) in order to preserve the rights of both the authors and readers in a sensible way.
Overview of the content of PlanetMath
Foundations of Mathematics
Index for the Foundations of Mathematics Bibliography for The Foundations of Mathematics
Algebra
Geometry
Topology
Algebraic Topology
Index for algebraic topology Bibliography for algebraic topology
Category Theory
Index for category theory Index of categories Bibliography for axiomatics and category theory
Higher Dimensional Algebra
Index for higher dimensional algebra Bibliography for higher dimensional algebra
Algebraic Geometry
Number Theory
Discrete Mathematics
Analysis
Differential Equations
Index of differential equations Bibliography for ordinary differential equations
Applied Mathematics
Index for Applied Mathematics Mathematical Foundations of Quantum Physics Axiomatic and Categorical Foundations of Mathematical Physics Bibliography for Mathematical Physics and Physical Mathematics
Order Theory and Logic Algebra
Mathematics Education and Educators
Elementary High school mathematics