# Set and Interval Notation

The following set and interval notation can be entered in Show My Work boxes.

Note: In addition to the keyboard shortcuts listed in this topic, some symbols can be
typed using the keyboard shortcuts for your operating system; for example, you can
press ALT+0247 on Windows to type
÷.

Notation | Keyboard | Button | Notes |
---|---|---|---|

Set delimiters (braces) |
{a,b |
A closing brace is automatically inserted. | |

Closed interval (brackets) |
[a,b |
A closing bracket is automatically inserted. | |

Open interval (parentheses) |
(a,b |
A closing parenthesis is automatically inserted. | |

Empty set |
∅ |
||

Union |
∪ |
||

Intersection |
∩ |
||

Subset |
⊂ |
||

Superset |
⊃ |
||

Element of |
∈ |
||

Not an element of |
∉ |

© 2015 Advanced Instructional Systems, Inc. (revised September 2015)