∌
Unicode
U+220CLaTeX
\not\niHTML entity
∌HTML decimal
∌MathML
<mo>∌</mo>Semantic identity and intent
Characters to distinguish
- ∉ — Not an Element Of
Use ∌ in the right format
Meaning and usage
States that a set does not contain a given element.
Use it as the reversed form of the not-element-of relation.
Pronunciation: does not contain as member
Formula examples
A∌xHow to type Does Not Contain As Member
- Windows
- Use Character Map or enter U+220C in a Unicode-aware application.
- macOS
- Open Character Viewer with Control–Command–Space and search by the symbol name.
- Microsoft Word
- In an equation, type \not\ni and press Space when Word supports the command.
- iPhone and iPad
- Copy and paste ∌, or use a math/LaTeX app. The standard iOS keyboard may not expose every mathematical symbol.
- Android
- Copy and paste ∌, or use a math keyboard or LaTeX editor. Keyboard layouts vary by device and app.
- Google Docs
- For plain text, paste ∌ or use Insert → Special characters. For structured math, use the equation editor and verify \not\ni.
- Excel
- Paste ∌ into a cell or use Insert → Symbol when available. Ordinary cells preserve the character but do not interpret LaTeX commands.
Common mistakes
- State the set-theory convention around ∌; Use it as the reversed form of the not-element-of relation.
- For plain text, copy ∌ as U+220C; for structured equations, use \not\ni in math mode. A look-alike glyph or image can break search, accessibility, or parsing when the intended character is Does Not Contain As Member.
When to use ∌
- Use ∌ in plain text when a Unicode character is appropriate and the destination preserves U+220C.
- Use \not\ni in an equation editor when mathematical spacing or structure matters.
- Define the local meaning when Does Not Contain As Member is used in set theory with a field-specific convention.
Look-alikes and related characters
- ∉ — Not an Element Of
Font and compatibility notes
Font coverage varies; verify the code point and destination rendering before publication.
Continue the workflow
From Does Not Contain As Member to a finished equation
- Copy the characterUse ∌ in plain text when Unicode is accepted.
- Choose a structured formatUse
\not\nifor LaTeX or the MathML snippet for accessible web equations. - Edit or convertOpen the value in the editor or converter without retyping it.
Review and source notes
Quality tier: catalog
Last reviewed: 2026-07-23
Review method: Catalog review of character identity and notation mappings.
Verified against: Unicode Standard, Unicode mathematical notation guidance, and established LaTeX/MathML syntax.
Reference sources
- The Unicode StandardUnicode Consortium — Character identity, encoding, names, and conformance.
- Unicode Character Code ChartsUnicode Consortium — Code points and official character charts.
Frequently asked questions
What does the Does Not Contain As Member symbol mean?
States that a set does not contain a given element.
What is the LaTeX command for ∌?
Use \not\ni in a compatible math environment.
Can I copy ∌ as Unicode?
Yes. Use the copy button above to copy the Unicode character directly.