⊎
Unicode
U+228ELaTeX
\uplusHTML entity
⊎HTML decimal
⊎MathML
<mo>⊎</mo>Semantic identity and intent
Characters to distinguish
- ∪ — Union
Use ⊎ in the right format
Meaning and usage
Combines collections while retaining element multiplicities.
State whether multiplicities are added or another disjoint-union convention is intended.
Pronunciation: multiset union
Formula examples
A⊎BHow to type Multiset Union
- Windows
- Use Character Map or enter U+228E 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 \uplus 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 \uplus.
- 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 ⊎; State whether multiplicities are added or another disjoint-union convention is intended.
- For plain text, copy ⊎ as U+228E; for structured equations, use \uplus in math mode. A look-alike glyph or image can break search, accessibility, or parsing when the intended character is Multiset Union.
When to use ⊎
- Use ⊎ in plain text when a Unicode character is appropriate and the destination preserves U+228E.
- Use \uplus in an equation editor when mathematical spacing or structure matters.
- Define the local meaning when Multiset Union is used in set theory, combinatorics with a field-specific convention.
Look-alikes and related characters
- ∪ — Union
Font and compatibility notes
Glyph shape can vary by font. Verify the code point after copying, and prefer LaTeX or MathML for structured equations.
Continue the workflow
From Multiset Union to a finished equation
- Copy the characterUse ⊎ in plain text when Unicode is accepted.
- Choose a structured formatUse
\uplusfor 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: specialist
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 Multiset Union symbol mean?
Combines collections while retaining element multiplicities.
What is the LaTeX command for ⊎?
Use \uplus in a compatible math environment.
Can I copy ⊎ as Unicode?
Yes. Use the copy button above to copy the Unicode character directly.