| 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 |
| 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 |