TNT Home Page

TNT is a collection of interfaces and reference implementations of numerical objects useful for scientific computing in C++. The toolkit defines interfaces for basic data structures, such as multidimensional arrays and sparse matrices, commonly used in numerical applications.

MathWorld

MathWorld is assembled over more than a decade by internet encyclopedist Eric W. Weisstein with assistance from the mathematics and internet communities. It quotes itself as the web's most extensive mathematics resource.