U+27E6 "⟦" Mathematical Left White Square Bracket Unicode Character
Unicode Version 17.0
⟦
U+27E6 "⟦" Mathematical Left White Square Bracket is a typographic symbol used primarily in mathematical notation and formal logic to denote a specific type of bracketing, often indicating a semantic evaluation function or a denotation in model theory and programming language semantics. Unlike ordinary square brackets, this character features a white (hollow) interior, which distinguishes it visually from its solid counterpart U+27E7 on the right side. It is encoded in the Unicode block "Miscellaneous Mathematical Symbols-A" and is supported in many modern fonts, allowing it to be reliably used in digital texts alongside standard mathematical symbols.
General Properties
| Code Point | U+27E6 |
| Version Added | 3.2 |
| Name | Mathematical Left White Square Bracket |
| Block | Miscellaneous Mathematical Symbols-A |
| General Category | Open Punctuation |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Mirrored | Yes |
| Mirrored Character | "⟧" U+27E7 Mathematical Right White Square Bracket |
| Bidirectional Paired Bracket Type | Open |
| Bidirectional Paired Bracket | "⟧" U+27E7 Mathematical Right White Square Bracket |
Encodings
| HTML Decimal Encoding | ⟦ |
| HTML Hex Encoding | ⟦ |
| UTF-8 Encoding | 0xE2 0x9F 0xA6 |
| UTF-16 Encoding | 0x27E6 |
| UTF-32 Encoding | 0x000027E6 |
| C/C++/Java Escape | \u27e6 |