set theory(redirected from Ordinary set theory)
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Related to Ordinary set theory: Classical set theory
The study of the properties of sets.
1. (Mathematics) maths the branch of mathematics concerned with the properties and interrelationships of sets
2. (Logic) logic a theory constructed within first-order logic that yields the mathematical theory of classes, esp one that distinguishes sets from proper classes as a means of avoiding certain paradoxes
the branch of mathematics that deals with relations between sets.
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|Noun||1.||set theory - the branch of pure mathematics that deals with the nature and relations of sets|
math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
pure mathematics - the branches of mathematics that study and develop the principles of mathematics for their own sake rather than for their immediate usefulness