U+2209 "∉" Not An Element Of Unicode Character
Unicode Version 17.0
∉
U+2209 "∉" Not An Element Of is a mathematical symbol used in set theory to indicate that an object is not a member of a given set, directly contrasting with the "element of" symbol (∈). It is typically rendered as a stylized epsilon with a diagonal slash through it, serving as a clear visual negation. This character is encoded in the Mathematical Operators block of the Unicode standard, allowing it to be used consistently across digital text for notation in mathematics, logic, and computer science without relying on image-based representations.
General Properties
| Code Point | U+2209 |
| Version Added | 1.1 |
| Name | Not An Element Of |
| Block | Mathematical Operators |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Mirrored | Yes |
| Mirrored Character | "∌" U+220C Does Not Contain as Member |
| Decomposition Type | Canonical |
| Decomposition Mapping | "∈" U+2208 Element Of "̸" U+0338 Combining Long Solidus Overlay |
Encodings
| HTML Decimal Encoding | ∉ |
| HTML Hex Encoding | ∉ |
| UTF-8 Encoding | 0xE2 0x88 0x89 |
| UTF-16 Encoding | 0x2209 |
| UTF-32 Encoding | 0x00002209 |
| C/C++/Java Escape | \u2209 |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC 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 |