**set theory** — n. the branch of mathematics that deals with the properties and relations of sets: see SET (n. 7) … English World dictionary

**set theory** — ► NOUN ▪ the branch of mathematics concerned with the formal properties and applications of sets … English terms dictionary

**Set theory** — This article is about the branch of mathematics. For musical set theory, see Set theory (music). A Venn diagram illustrating the intersection of two sets. Set theory is the branch of mathematics that studies sets, which are collections of objects … Wikipedia

**set theory** — the branch of mathematics that deals with relations between sets. [1940 45] * * * 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… … Universalium

**set theory** — The modern theory of sets was largely inspired by Cantor, whose proof that the set of real numbers could not be put into a one to one correspondence with the set of natural numbers opened the door to the set theoretic hierarchy, and to the study… … Philosophy dictionary

**set theory** — /ˈsɛt θɪəri/ (say set thearree) noun the branch of mathematics that deals with the properties of sets (def. 78) … Australian English dictionary

**set theory** — set′ the ory n. math. the branch of mathematics that deals with relations between sets • Etymology: 1940–45 … From formal English to slang

**set theory** — noun The mathematical theory of sets … Wiktionary

**set theory** — noun Date: 1936 a branch of mathematics or of symbolic logic that deals with the nature and relations of sets • set theoretic adjective … New Collegiate Dictionary

**set theory** — branch of mathematics that deals with the grouping of theorems and proving them … English contemporary dictionary