⊋

Math Operator 136

Unicode
U+228B
Category
Math
HTML Entity
⊋
CSS
\228B
The "Superset of Above Not Equal To" symbol (⊋) is used in mathematical set theory to denote a strict superset. It signifies that a primary set contains all elements of a secondary set, but also includes at least one additional element, meaning the two sets are not identical. While primarily found in academic papers and mathematical equations, it occasionally appears in technical documentation to clarify strict hierarchical boundaries.

How to Type

Windows
Type 228B followed by Alt + X in Microsoft Word, or use Alt + 8843 on the numeric keypad
macOS
Control + Command + Space, then search 'superset'
Linux
Ctrl + Shift + U, type 228b, then press Enter
HTML
⊋ or ⊋

In Programming

While rarely used directly as an operator in source code, this symbol frequently appears in LaTeX markup (as \supsetneq) to format mathematical proofs, data structures, and algorithm documentation.

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Tags

A ⊋ B meaning HTML ⊋ LaTeX proper superset U+228B \supsetneq \varsupsetneq inclusion mathematics proper superset proper superset symbol set theory strict superset strict superset not equal superset not equal to type proper superset symbol

Related Symbols

± Plus Minus Sign × Multiplication Sign ÷ Division Sign ≠ Not Equal To ≈ Approximately Equal To ∞ Infinity √ Square Root ∑ Summation ∫ Integral π Pi ≤ Less Than or Equal To ≥ Greater Than or Equal To