# set theory

set theory

**MLA Style**

"set theory." YourDictionary, n.d. Web. 19 September 2018. <http://www.yourdictionary.com/set-theory>.

**APA Style**

set theory. (n.d.). Retrieved September 19th, 2018, from http://www.yourdictionary.com/set-theory

## set theory

noun

*Mathematics*

**MLA Style**

"set theory." YourDictionary, n.d. Web. 19 September 2018. <http://www.yourdictionary.com/set-theory>.

**APA Style**

set theory. (n.d.). Retrieved September 19th, 2018, from http://www.yourdictionary.com/set-theory

**MLA Style**

"set theory." YourDictionary, n.d. Web. 19 September 2018. <http://www.yourdictionary.com/set-theory>.

**APA Style**

set theory. (n.d.). Retrieved September 19th, 2018, from http://www.yourdictionary.com/set-theory

## set theory - Computer Definition

The branch of mathematics or logic that is concerned with sets of objects and rules for their manipulation. UNION, INTERSECT and COMPLEMENT are its three primary operations and they are used in relational databases as follows. Given a file of Americans and a file of golfers, UNION would create a file of all Americans and golfers. INTERSECT would create a file of American golfers, and COMPLEMENT would create a file of golfers who are not Americans, or of Americans who are not golfers. See fuzzy logic.

**MLA Style**

**APA Style**

set theory. (n.d.). Retrieved September 19th, 2018, from http://www.yourdictionary.com/set-theory