Mathematics

A digital library for classical mathematics in the World Wide Web.

A free resource from Wolfram Research based on Eric Weissteinn CRC Concise Encyclopedia of Mathematics.

An open website of problems and puzzles, online mentoring, research, team problem solving, collaborations, and professional development.

MathDL is an online resource published by the Mathematical Association of America. The site provides online resources for both teachers and students of mathematics.

How many degrees of separation between various mathematicians?

A free electronic copy of NIST Handbook of Mathematical Functions. Contains notation, properties, applications, and computation.

a free database created by a consortium of European universities, research institutes and libraries. Includes over 200,000 documents from scholarly journals, monographs, and multivolume works with a few publications going back as far as the 1800s.

SIAM exists to ensure the strongest interactions between mathematics and other scientific and technological communities through membership activities, publication of journals and books, and conferences."