Set Language & Notation
$\in$: is an element of
n($A$): number of elements in set $A$
$A’$: complement of set A
$\varnothing$: empty set
$\xi$: universal set
$\cup$: union
$\cap$: intercept
$\subset$: subset
n($A$): number of elements in set $A$
$A’$: complement of set A
$\varnothing$: empty set
$\xi$: universal set
$\cup$: union
$\cap$: intercept
$\subset$: subset