set theory


set theory

noun

Definition of SET THEORY

:  a branch of mathematics or of symbolic logic that deals with the nature and relations of sets
set theoretic adjective

First Known Use of SET THEORY

1936

set theory

noun    (Concise Encyclopedia)

Branch of mathematics that deals with the properties of sets. It is most valuable as applied to other areas of mathematics, which borrow from and adapt its terminology and concepts. These include the operations of union (), and intersection (). The union of two sets is a set containing all the elements of both sets, each listed once. The intersection is the set of all elements common to both original sets. Set theory is useful in analyzing difficult concepts in mathematics and logic. It was placed on a firm theoretical footing by Georg Cantor, who discovered the value of clearly formulated sets in the analysis of problems in symbolic logic and number theory.

Browse

Next Word in the Dictionary: setting
Previous Word in the Dictionary: setterwort
All Words Near: set theory

Seen & Heard

What made you want to look up set theory? Please tell us where you read or heard it (including the quote, if possible).