HTML Entity for Multiset Multiplication (⊍)

Intermediate
⏱️ 5 min read
📚 Updated: Jun 2026
🎯 1 Code Example
Unicode U+228D
HTML entity for Multiset Multiplication symbol (U+228D) — named cupdot, hex, decimal, and CSS tutorial

What You'll Learn

How to display the Multiset Multiplication symbol (⊍) in HTML using named, hexadecimal, decimal, and CSS escape methods. This character is U+228D (MULTISET MULTIPLICATION) in the Mathematical Operators block (U+2200–U+22FF)—the operator for multiplying multisets (bags) in set theory and combinatorics.

Render it with the named entity ⊍, ⊍, ⊍, or CSS escape \228D. This is a mathematical Unicode symbol for notation—not executable code. Pair with Multiset (⊌) and Multiset Union (⊎, ⊎) in the multiset operator family.

⚡ Quick Reference — Multiset Multiplication

Unicode U+228D

Mathematical Operators

Hex Code ⊍

Hexadecimal reference

HTML Code ⊍

Decimal reference

Named Entity ⊍

Multiset multiplication (cup dot)

Reference Table
Name           Value
────────────   ──────────
Unicode        U+228D
Hex code       ⊍
HTML code      ⊍
Named entity   ⊍
CSS code       \228D
Meaning        Multiset multiplication operator
Related        U+228C = multiset (⊌)
               U+228E = multiset union (⊎, ⊎)
1

Complete HTML Example

This example demonstrates the Multiset Multiplication symbol (⊍) using hexadecimal code, decimal HTML code, the named entity, and a CSS content escape:

html
<!DOCTYPE html>
<html>
<head>
 <style>
  #point:after{
   content: "\228D";
  }
 </style>
</head>
<body>
<p>Multiset Multiplication using Hexadecimal: &#x228D;</p>
<p>Multiset Multiplication using HTML Code: &#8845;</p>
<p>Multiset Multiplication using Named Entity: &cupdot;</p>
<p id="point">Multiset Multiplication using CSS Entity: </p>
</body>
</html>
Try it Yourself

🌐 Browser Support

U+228D is supported in modern browsers; use a font with Mathematical Operators coverage for consistent glyphs:

Chrome 1+
Firefox 1+
Safari 1+
Edge 12+
Opera 4+
Android 4.4+
iOS Safari 1+

👀 Live Preview

See the Multiset Multiplication symbol (⊍) in set theory contexts:

Operation A ⊍ B
Multiset family ⊌ ⊍ ⊎
Large glyph ⊍
vs times sign ⊍ multiset   × ordinary
Entity refs &cupdot; &#x228D; &#8845; \228D

🧠 How It Works

1

Named Entity

&cupdot; is the HTML named entity for Multiset Multiplication (union with dot)—often preferred in readable mathematical markup.

HTML markup
2

Hexadecimal Code

&#x228D; uses the Unicode hexadecimal value 228D. The x prefix indicates hexadecimal format.

HTML markup
3

Decimal HTML Code

&#8845; uses the decimal Unicode value 8845 to display the same character.

HTML markup
4

CSS Entity

\228D is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.

CSS stylesheet
=

Same visual result

All four methods produce: ⊍. Unicode U+228D in Mathematical Operators. Related: Multiset Union (⊎, &uplus;).

✅

Use Cases

The Multiset Multiplication symbol (⊍) is commonly used in:

🔢 Set theory

Multiset multiplication on bags and combinatorial collections.

📊 Combinatorics

Formal notation for operations on multisets with repetition.

📚 Academia

Discrete math textbooks, papers, and lecture materials.

💻 Formal methods

Specification docs describing bag algebra and operations.

🎓 Education

Online courses on sets, combinatorics, and discrete structures.

🌐 Reference guides

Unicode charts and HTML entity documentation.

💡 Best Practices

Do

  • Use &cupdot; for readable multiset multiplication markup
  • Pair with ⊌ and ⊎ when documenting multiset algebra
  • Use fonts that cover Mathematical Operators (Cambria Math, etc.)
  • Add aria-label (e.g. “multiset multiplication”) for accessibility
  • Serve pages with UTF-8 (<meta charset="utf-8">)

Don’t

  • Confuse &cupdot; (⊍) with &times; (×)
  • Assume HTML entities perform computation on multisets
  • Put CSS escape \228D in HTML text nodes
  • Mix entity styles randomly in one file
  • Rely on the symbol alone without accessible description

Key Takeaways

1

Three HTML references plus CSS all render ⊍

&#x228D; &#8845; &cupdot;
2

For CSS stylesheets, use the escape in the content property

\228D
3

Unicode U+228D — MULTISET MULTIPLICATION

4

&cupdot; is the standard named entity

5

Related: Multiset (⊌) and Multiset Union (⊎)

❓ Frequently Asked Questions

Use &cupdot; (named), &#x228D; (hex), &#8845; (decimal), or \228D in CSS content. All produce ⊍.
U+228D (MULTISET MULTIPLICATION). Mathematical Operators block (U+2200–U+22FF). Hex 228D, decimal 8845. Named entity: &cupdot;.
When documenting multiset multiplication in set theory, combinatorics, formal methods, and academic content involving bag operations.
⊌ (U+228C) is the general Multiset symbol. ⊍ (U+228D, &cupdot;) is specifically the multiset multiplication operator. They are related but distinct notation symbols.
HTML entities (&#8845;, &#x228D;, or &cupdot;) go directly in markup. The CSS escape \228D is used in stylesheets, typically in the content property of pseudo-elements. Same visual result, different layers of the stack.

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About the author

Mari Selvan M P
Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

  • Experience 12 years building web and cloud systems
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I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

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Multiset (⊌) Multiset Union (⊎)