⊄
Math Operator 129
- Unicode
- U+2284
- Category
- Math
- HTML Entity
- ⊄
- CSS
- \2284
The "Not a Subset Of" symbol (⊄) is a mathematical operator from set theory used to show that one set is not entirely contained within another. Added to Unicode in 1993, this character visually strikes a slash through the standard subset symbol (⊂) to negate its meaning. While primarily found in academic papers, textbooks, and mathematical documentation, it occasionally pops up in online discussions about logic and discrete mathematics.
How to Type
- Windows
- Alt+8836 or Win+. then search "subset"
- macOS
- Control+Command+Space then search "not a subset"
- Linux
- Ctrl+Shift+U then 2284
- HTML
- ⊄ or ⊄
In Programming
In mathematical typesetting systems like LaTeX, this symbol is generated using the commands \not\subset or \nsubset. While most programming languages rely on functions like !issubset(A, B) for set logic, mathematically focused languages like Julia allow you to use ⊄ directly as an operator in your code.
Tags
A not subset of B
HTML ⊄
LaTeX not subset
U+2284
\not\subset
\nsubset
exclusion
mathematics
negation
not contained in
not subset
set theory
set theory negation
type not subset symbol