Venn Diagrams, Universal Sets, Complement of a Set and Subsets

Definition of universal set

A set that consists of all the elements under discussion

The symbol for universal set

Definition of complement of a set

The elements in the universal set that are not the elements of the set

Complement of set A

A'

Definition of subset of a set

A set whereby all of its elements are the elements of another set

The symbol for "is a subset of"

Empty set

A subset of any set