The words set theory can be used to mean a number of subtly different things:
Naive set theory is the original set theory developed by mathematicians at the end of the 19th century
Axiomatic set theory is a rigorous axiomatic theory developed in response to the discovery of serious flaws (such as Russell's Paradox) in naive set theory.
Musical set theory may be considered the application of mathematical set theory to music.
This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.
