U+2990 "⦐" Right Square Bracket with Tick in Top Corner Unicode Character
Unicode Version 17.0
⦐
U+2990 "⦐" Right Square Bracket with Tick in Top Corner is a specialized typographic symbol used primarily in mathematical notation and formal logic. It features a standard right square bracket with a small inward-facing tick or hook at its upper corner, distinguishing it from a plain bracket. This character often serves as a delimiter in sets, intervals, or complex expressions, where the tick indicates an exclusive or half-open boundary on the top side, similar to how a half-open interval is denoted in interval notation. Its inclusion in Unicode supports precise typesetting in academic and technical documents, ensuring clarity in symbolic communication without relying on makeshift alternatives.
General Properties
| Code Point | U+2990 |
| Version Added | 3.2 |
| Name | Right Square Bracket with Tick in Top Corner |
| Block | Miscellaneous Mathematical Symbols-B |
| General Category | Close Punctuation |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Mirrored | Yes |
| Mirrored Character | "⦍" U+298D Left Square Bracket with Tick in Top Corner |
| Bidirectional Paired Bracket Type | Close |
| Bidirectional Paired Bracket | "⦍" U+298D Left Square Bracket with Tick in Top Corner |
Encodings
| HTML Decimal Encoding | ⦐ |
| HTML Hex Encoding | ⦐ |
| UTF-8 Encoding | 0xE2 0xA6 0x90 |
| UTF-16 Encoding | 0x2990 |
| UTF-32 Encoding | 0x00002990 |
| C/C++/Java Escape | \u2990 |