≡
Unicode
U+2261LaTeX
\equivHTML entity
HTML decimal
≡MathML
<mo>≡</mo>Semantic identity and intent
Characters to distinguish
- ∣ — Divides
- ∤ — Does Not Divide
- ⌊ — Left Floor
Use ≡ in the right format
Meaning and usage
Indicates that two integers have the same remainder modulo a modulus.
Always include the modulus to distinguish modular congruence from identity.
Pronunciation: congruent modulo
Formula examples
17 \equiv 2 \pmod{5}How to type Congruent Modulo
- Windows
- Open Character Map and search by name or Unicode U+2261.
- macOS
- Open Character Viewer with Control–Command–Space and search by the symbol name.
- Microsoft Word
- In an equation, type \equiv 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 \equiv.
- Excel
- Paste ≡ into a cell or use Insert → Symbol when available. Ordinary cells preserve the character but do not interpret LaTeX commands.
Common mistakes
- Preserve grouping, operator order, and spacing around ≡; Always include the modulus to distinguish modular congruence from identity.
- For plain text, copy ≡ as U+2261; for structured equations, use \equiv in math mode. A look-alike glyph or image can break search, accessibility, or parsing when the intended character is Congruent Modulo.
When to use ≡
- Use ≡ in plain text when a Unicode character is appropriate and the destination preserves U+2261.
- Use \equiv in an equation editor when mathematical spacing or structure matters.
- Define the local meaning when Congruent Modulo is used in number theory with a field-specific convention.
Look-alikes and related characters
- ∣ — Divides
- ∤ — Does Not Divide
- ⌊ — Left Floor
Font and compatibility notes
Font coverage varies; verify the code point and destination rendering before publication.
Continue the workflow
From Congruent Modulo to a finished equation
- Copy the characterUse ≡ in plain text when Unicode is accepted.
- Choose a structured formatUse
\equivfor 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 Congruent Modulo symbol mean?
Indicates that two integers have the same remainder modulo a modulus.
What is the LaTeX command for ≡?
Use \equiv in a compatible math environment.
Can I copy ≡ as Unicode?
Yes. Use the copy button above to copy the Unicode character directly.