Find out exactly what a natural number is and what some of the controversy is over the definition.

Explains major concepts in "category theory," a common alternative to traditional set theory. Some familiarity with the logical notation is assumed. Article does include sections on the history and general philosophical significance of...

Explains the logical theory of "many-valued logic," a modern alternative to classic logic. Sections address its history, notation and proofs, and applications to linguistics, mathematics, philosophy, and artificial intelligence. For the...

Explains briefly the history and significance of Russell's famous logical paradox. Includes links to other Russell-related websites. Uses a minimum of technical notation.

This site is an overview of the life and work of Johannes Tinctoris. It explains several important details on his work in notation and musical composition. Also makes reference to his musical dictionary (the first musical dictionary in...

Primary source documents from the Library of Congress's American Memory collection about how people in the eighteenth century learned to dance. Page through a dozen manuals from the era that give details about how dances and dance...

A brief description of the earliest Greek numberical notation, the Attic system, followed by a more detailed description of the alphabetical system that replaced it.

Dance notation and characteristics of the "sousta", a form of Greek dance.