U+29B4 "⦴" Empty Set with Left Arrow Above Unicode Character
Unicode Version 17.0
⦴
U+29B4 "⦴" Empty Set with Left Arrow Above is a mathematical symbol that combines the standard empty set notation, a slashed circle representing a set with no elements, with a leftward pointing arrow positioned above it. This composite glyph is typically used in advanced set theory or logic contexts to denote a variant of the empty set that carries a directional or functional implication, such as indicating the leftward mapping of a void or null value within a conceptual framework. Its inclusion in the Unicode standard ensures that mathematicians and logicians can digitally represent this precise symbolic nuance without resorting to ad hoc formatting.
General Properties
| Code Point | U+29B4 |
| Version Added | 3.2 |
| Name | Empty Set with Left Arrow Above |
| Block | Miscellaneous Mathematical Symbols-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 0xA6 0xB4 |
| UTF-16 Encoding | 0x29B4 |
| UTF-32 Encoding | 0x000029B4 |
| C/C++/Java Escape | \u29b4 |
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 |