Sets and Notation (HSC SSCE Mathematics Advanced): Flashcards

Collection of distinct objects or elements

Using curly brackets ${ }$

Number of elements in a set

$n(A)$ or $|A|$

Set with no elements

$\varnothing$ or $\{\}$

Every element of $B$ is in $A$

$B$ subset of $A$ with strictly fewer elements

Elements in universal set $U$ not in $A$

Complete collection of all elements under consideration