Question

Define Set Theory ? Briefly​

Answer 1

Answer:

Set theory is the mathematical theory of well-determined collections, called sets, of objects that are called members, or elements, of the set. ... So, the essence of set theory is the study of infinite sets, and therefore it can be defined as the mathematical theory of the actual—as opposed to potential—infinite.

Answer 2

Set theory is the mathematical theory of well determined collection called sets....