Frequently Asked Questions Thousands of web sites for educators and students. Support for long-term classroom planning and professional development. Information covering important topics for today's educators and parents. Entries cover topics that range from current mathematics research to classroom topics from algebra to topology to the historical development of mathematics. For over a decade, Internet encyclopedist Eric W. Weisstein, with assistance from the mathematics and Internet communities, has worked to develop this site.
Entries offer an interlinked framework of mathematical exposition and illustrative examples.
Mathematical topics are indexed by subject, presented in an alphabetical list, and also found by using a searchable database. The interactive illustrations explain mathematics topics such as the Whitney Umbrella, a self intersecting rectangle. Another entry features eight rotating antiprisms with related nets and descriptions with equations for each solid. Also found are images that can be rotated for unusual solids found in the art of Escher and Durer. References are included with all entries.