U+2288 "⊈" Neither A Subset of nor Equal To Unicode Character
Unicode Version 17.0
⊈
U+2288 "⊈" Neither A Subset of nor Equal To is a mathematical symbol used in set theory to indicate that one set is not a subset of another set and is also not equal to it, effectively combining a negation of two relations. It visually resembles the standard subset symbol (⊆) but with a diagonal stroke through it, signaling that the relationship it describes is false. In formal notation, "A ⊈ B" means that set A is not a subset of set B and A is not equal to B, so there exists at least one element in A that is not in B, and the sets are distinct. This symbol is commonly encountered in proofs, logic, and discrete mathematics where precise set relationships must be articulated.
General Properties
| Code Point | U+2288 |
| Version Added | 1.1 |
| Name | Neither A Subset of nor Equal To |
| Block | Mathematical Operators |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Mirrored | Yes |
| Mirrored Character | "⊉" U+2289 Neither A Superset of nor Equal To |
| Decomposition Type | Canonical |
| Decomposition Mapping | "⊆" U+2286 Subset of or Equal To "̸" U+0338 Combining Long Solidus Overlay |
Encodings
| HTML Decimal Encoding | ⊈ |
| HTML Hex Encoding | ⊈ |
| UTF-8 Encoding | 0xE2 0x8A 0x88 |
| UTF-16 Encoding | 0x2288 |
| UTF-32 Encoding | 0x00002288 |
| C/C++/Java Escape | \u2288 |
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 |