U+2901 "⤁" Rightwards Two-Headed Arrow with Double Vertical Stroke Unicode Character
Unicode Version 17.0
⤁
U+2901 "⤁" Rightwards Two-Headed Arrow with Double Vertical Stroke is a mathematical and technical symbol used within the larger set of arrows and supplementary arrows in Unicode. It depicts an arrow pointing to the right with two distinct arrowheads at its tip, which is crossed by two vertical lines that form a double stroke through the shaft. This design often indicates a specialized relationship in diagrams or formal logic, such as a function that is both injective and surjective, or a mapping that possesses a unique bidirectional constraint. The double vertical stroke adds a layer of meaning beyond a standard arrow, typically signifying a restrictive or defined property in abstract mathematical notation.
General Properties
| Code Point | U+2901 |
| Version Added | 3.2 |
| Name | Rightwards Two-Headed Arrow with Double Vertical Stroke |
| Block | Supplemental Arrows-B |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ⤁ |
| HTML Hex Encoding | ⤁ |
| UTF-8 Encoding | 0xE2 0xA4 0x81 |
| UTF-16 Encoding | 0x2901 |
| UTF-32 Encoding | 0x00002901 |
| C/C++/Java Escape | \u2901 |
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 |