N-ary Union Symbol
⋃ (N-ary Union) denotes a union operation applied across many sets.
U+22C3
The symbol ⋃ is commonly used in mathematics to express the union of many sets at once. It is the “N-ary union” form, designed for combining multiple elements or collections. You can copy it from this page or use its Unicode/HTML/CSS forms in code.
N-ary Union Symbol Meaning
⋃ is the Unicode character named “N-ARY UNION” with code point U+22C3. In mathematics, it indicates a union operation over a collection of sets (or objects). Instead of writing separate unions repeatedly, the N-ary form compactly expresses “take the union of all sets indexed by some condition.” You’ll often see it in set theory and logic when a subscript, index, or range describes which sets are being combined. The symbol is typographically distinct from the regular union (∪) and is meant to emphasize combining many sets in one expression.
Common uses
- •Writing set theory expressions that union a whole family of sets indexed by a condition
- •Documenting database or programming concepts like combining multiple result sets into one
- •Creating math notes or study materials that summarize repeated union operations compactly
- •Designing equations in LaTeX-like educational content and worksheets
- •Formatting technical blog posts where a clean “union of many” notation improves readability
Examples
⋃ N-ary Union Symbol (U+22C3)
- ⋃⋃_{i=1}^{n} A_i
- ⋃⋃_{S∈\\mathcal{F}} S
- ⋃Let B = ⋃_{k∈K} B_k.
- ⋃The set U is ⋃ U_i across all partitions.
- ⋃Define T = ⋃_{x∈X} f(x).
Variations
Ready to copy
Technical codes
| Unicode | U+22C3 | |
| HTML Entity | ⋃ | |
| HTML Code | ⋃ | |
| CSS | \22C3 | |
| Alt Code | Alt + 8899 | |
| Decimal | 8899 |
How to type N-ary Union Symbol (⋃)
On Windows
Hold Alt and type 8899 on the numeric keypad. In Word, type 22C3 then press Alt + X.
On Mac
Switch to the Unicode Hex Input keyboard, then hold Option and type 22C3. Or press Control + Command + Space and search.
On Linux
Press Control + Shift + U, type 22c3, then press Enter or Space.
Anywhere
Copy ⋃ with the button above and paste it wherever you need it — this works on every device and in every app, with no keyboard shortcut to remember.
FAQ
What is the Unicode name and code point for ⋃?
The symbol ⋃ has the Unicode name “N-ARY UNION” and the code point U+22C3.
How do I copy ⋃ into HTML?
You can use the HTML entity: ⋃.
What does ⋃ mean in math?
It means an N-ary union: the union operation applied across a collection of sets (often described by an index or condition).
What are the CSS or JavaScript escape forms for ⋃?
CSS escape: \\22C3. JavaScript escape: \\u{22C3}.