U+2A1D · Math symbol
LaTeX
\Join
Join Symbol ⨝
⨝ is join, U+2A1D — \Join in LaTeX. It was added in Unicode 3.2, and Unicode files it under Math symbol.
Also known as
- large bowtie
What Unicode says about ⨝
relational database theory
— annotation from the Unicode Standard, NamesList.txt
Codes & technical data
| Unicode | U+2A1D | |
|---|---|---|
| HTML hex | ⨝ | |
| HTML decimal | ⨝ | |
| CSS | \2A1D | |
| JavaScript | \u{2A1D} | |
| Python | \U00002A1D | |
| Java / C# | \u2A1D | |
| Rust | \u{2a1d} | |
| Swift | \u{2A1D} | |
| PHP | \u{2A1D} | |
| URL encoded | %E2%A8%9D | |
| UTF-8 bytes | E2 A8 9D | |
| UTF-16 bytes | 2A1D | |
| Base64 | 4qid | |
| Decimal | 10781 | |
| LaTeX | \Join | |
| Category | Math symbol (Sm) | |
| Introduced | Unicode 3.2 | |
Will ⨝ survive being pasted?
- Normalisation. Yes. ⨝ is unchanged by NFKC, so it survives normalising systems intact.
- Legacy encodings. ⨝ is Unicode-only — it has no Latin-1 equivalent, so a system stuck on an 8-bit encoding cannot represent it.
- Size. 3 bytes in UTF-8. Character-limited fields — SMS, bios, some form validators — usually count bytes, not characters.
Unicode cross-references
The standard points readers of ⨝ at these characters — usually because they look alike, or because one is the correct choice where the other is often used by mistake.
Nearby in Supplemental Mathematical Operators
A second full block of operators: n-ary forms, integrals with modifiers, and the dense family of comparison relations that differ only in the slant or stroke of the equals bar.
How to type ⨝
| Windows | Type 2A1D then press Alt+X |
|---|---|
| macOS | Press Ctrl+Cmd+Space, then search for “join” |
| Linux | Press Ctrl+Shift+U, type 2a1d, press Enter |
| HTML | ⨝ |
About Unicode’s Math symbol category
Unicode classifies this as a mathematical symbol, which means software that lays out formulas treats it as an operator or relation and gives it spacing accordingly, rather than setting it tight against its neighbours like a letter.
Frequently asked questions
- How do I type the ⨝ join symbol?
- On Windows, type 2A1D and press Alt+X. On Linux press Ctrl+Shift+U then 2a1d. On any system the quickest route is the copy button on this page.
- What is the code for ⨝?
- Join is U+2A1D and in LaTeX as \Join. In UTF-8 it takes 3 bytes. The table above lists every escape format.
- What kind of character is ⨝?
- Join is filed under Math symbol in the Supplemental Mathematical Operators block, and was introduced in Unicode 3.2. Unicode classifies this as a mathematical symbol, which means software that lays out formulas treats it as an operator or relation and gives it spacing accordingly, rather than setting it tight against its neighbours like a letter.