U+228E "⊎" Multiset Union Unicode Character
Unicode Version 17.0
⊎
U+228E "⊎" Multiset Union is a mathematical symbol used to represent the union operation specifically for multisets, also known as bags, where each element's multiplicity is summed rather than simply combined without duplicates as in standard set union. For example, if a multiset contains two copies of 'a' and another contains three, their multiset union will contain five copies of 'a'. This operator is essential in fields like combinatorics, database theory, and formal language processing where the frequency of elements matters. Its design features a plus sign nested inside a union symbol, visually indicating the additive nature of the operation.
General Properties
| Code Point | U+228E |
| Version Added | 1.1 |
| Name | Multiset Union |
| Block | Mathematical Operators |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ⊎ |
| HTML Hex Encoding | ⊎ |
| UTF-8 Encoding | 0xE2 0x8A 0x8E |
| UTF-16 Encoding | 0x228E |
| UTF-32 Encoding | 0x0000228E |
| C/C++/Java Escape | \u228e |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| NFKC Quick Check | Yes |
| NFKD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Pattern Syntax | Yes |
| Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |