set theory

1. 1.

   the branch of pure mathematics that deals with the nature and relations of sets

   Broaderpure mathematics

   mathematics

Questions about set theory

What does set theory mean?

set theory means "the branch of pure mathematics that deals with the nature and relations of sets".

Is set theory a common word?

set theory is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.