Mathematics

MathWorld is a convenient, comprehensive, and interactive mathematics encyclopedia intended for students, educators, math enthusiasts, and researchers. This site is continuously updated to include new material and incorporate new discoveries.

A dictionary of algorithms, algorithmic techniques, data structures, archetypal problems, and related definitions.

A dictionary of unit measurements.

This online database has over 220,000 sequences. Each entry contains the leading terms of the sequence, keywords, mathematical motivations, literature links, and more, including the option to generate a graph or play a musical representation of the sequence.

This encyclopedia contains an extensive collection of information on mathematical functions.

Desmos offers free online graphing, scientific, 3D, and geometry calculators.

Provides a variety of topics linked to various mathematicians and including such things as lists of publications, reviews, and transcripts of lectures.

Biographies of female mathematicians.