Transcript Set Theory

Set Theory
Definitions
Sets
 A collection of elements or items.
 Symbol: =
Elements

 The individual objects in a set.
 Symbol:
Subsets
 When all the elements of a set are
also elements of another set.
 Symbol:

Union
 All of the elements from 2 or more
sets.
 Symbol:

Intersection
 A set of elements that 2 or more sets
have in common.
 Symbol:


Complement
 A set of elements that are NOT in a
given set.
 Symbol: A
 {5}

{Positive integers}
 {1,2,3}
U
 U={all real numbers}