Intents for Subject set theory

absolute-complement
a
Y
element-of
$1 is in $2
$1 is an element of $2
$1 is a member of $2
$1 within $2
$1 is between $2.1 and $2.2
$1 belongs to $2
$1 belonging to $2
Y
empty-set
{ }
intersection
$1 intersect $2
$1 intersected with $2
the intersection of $1 and $2
$1 and $2
Y Y
not-element-of
Y
number-set
n
Integers, positive integers, Z 2
proper-subset-of
Y
proper-superset-of
Y
set-difference
\
$1 minus $2
$2 subtracted from $1
the difference between $1 and $2
the relative complement of $2 in $1
Y
subset-of-or-equal
Y
union
$1 union $2
the union of $1 and $2
$1 or $2
Y