HTML Entity for Multimap (⊸)

Intermediate
⏱️ 5 min read
📚 Updated: Jun 2026
🎯 1 Code Example
Unicode U+22B8
HTML entity for Multimap symbol (U+22B8) — named mumap, hex, decimal, and CSS tutorial

What You'll Learn

How to display the Multimap symbol (⊸) in HTML using named, hexadecimal, decimal, and CSS escape methods. This character is U+22B8 (MULTIMAP) in the Mathematical Operators block (U+2200–U+22FF)—a relation symbol used for multivalued maps, for example “f : A ⊸ B.”

Render it with the named entity ⊸, ⊸, ⊸, or CSS escape \22B8. This is a mathematical Unicode symbol—not related to C++ std::multimap or key-value containers in programming. Do not confuse ⊸ with maps-to ↦ (↦, ↦) or ordinary function arrow notation.

⚡ Quick Reference — Multimap

Unicode U+22B8

Mathematical Operators

Hex Code ⊸

Hexadecimal reference

HTML Code ⊸

Decimal reference

Named Entity ⊸

Multimap (most readable)

Reference Table
Name           Value
────────────   ──────────
Unicode        U+22B8
Hex code       ⊸
HTML code      ⊸
Named entity   ⊸
CSS code       \22B8
Meaning        Multimap / multivalued relation
Related        U+21A6 = maps to (↦, ↦)
               U+22A7 = models (⊧, ⊧)
1

Complete HTML Example

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

html
<!DOCTYPE html>
<html>
<head>
 <style>
  #point:after{
   content: "\22B8";
  }
 </style>
</head>
<body>
<p>Multimap using Hexadecimal: &#x22B8;</p>
<p>Multimap using HTML Code: &#8888;</p>
<p>Multimap using Named Entity: &mumap;</p>
<p id="point">Multimap using CSS Entity: </p>
</body>
</html>
Try it Yourself

🌐 Browser Support

U+22B8 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 Multimap symbol (⊸) in mathematical relation notation:

Multivalued map f : A ⊸ B
Relation R ⊸ S
Large glyph ⊸
vs maps-to ⊸ multimap   ↦ mapsto
Entity refs &mumap; &#x22B8; &#8888; \22B8

🧠 How It Works

1

Named Entity

&mumap; is the HTML named entity for Multimap—often preferred in readable mathematical markup.

HTML markup
2

Hexadecimal Code

&#x22B8; uses the Unicode hexadecimal value 22B8. The x prefix indicates hexadecimal format.

HTML markup
3

Decimal HTML Code

&#8888; uses the decimal Unicode value 8888 to display the same character.

HTML markup
4

CSS Entity

\22B8 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+22B8 in Mathematical Operators. For single-valued maps, see maps-to (↦, &mapsto;).

✅

Use Cases

The Multimap symbol (⊸) is commonly used in:

🔢 Set theory

Multivalued maps and relations between sets (f : A ⊸ B).

📚 Academia

Mathematics papers, textbooks, and lecture notes on relations.

💻 CS theory

Formal semantics and relation notation in theoretical CS content.

🎓 Education

Online courses on discrete math, logic, and set theory.

📄 Reference guides

Unicode charts and HTML entity documentation.

🌐 Symbol libraries

Math symbol pickers and character reference cheat sheets.

💡 Best Practices

Do

  • Use &mumap; for readable HTML source in math notation
  • Distinguish ⊸ (multimap) from ↦ (maps-to / single-valued)
  • Use fonts that cover Mathematical Operators (Cambria Math, etc.)
  • Add aria-label (e.g. “multimap”) for accessibility
  • Serve pages with UTF-8 (<meta charset="utf-8">)

Don’t

  • Confuse this math symbol with C++ std::multimap containers
  • Assume &mumap; creates or stores key-value data in HTML
  • Put CSS escape \22B8 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 ⊸

&#x22B8; &#8888; &mumap;
2

For CSS stylesheets, use the escape in the content property

\22B8
3

Unicode U+22B8 — MULTIMAP

4

&mumap; is the standard named entity

5

Math symbol only—not a programming data structure

❓ Frequently Asked Questions

Use &mumap; (named), &#x22B8; (hex), &#8888; (decimal), or \22B8 in CSS content. All produce ⊸.
U+22B8 (MULTIMAP). Mathematical Operators block (U+2200–U+22FF). Hex 22B8, decimal 8888. Named entity: &mumap;.
When documenting multivalued maps or relations in mathematics and set theory (e.g. f : A ⊸ B), in academic content, textbooks, and Unicode symbol references.
Only by name. U+22B8 (⊸) is a Unicode mathematical relation symbol rendered via HTML entities. It does not implement or represent a C++ container or any runtime data structure.
HTML entities (&#8888;, &#x22B8;, or &mumap;) go directly in markup. The CSS escape \22B8 is used in stylesheets, typically in the content property of pseudo-elements. Same visual result, different layers of the stack.

Explore More HTML Entities!

Discover 1500+ HTML character references — math operators, relations, and more.

All HTML Entities →

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
  • Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

8 people found this page helpful

Much Less Than (≪) Multiplication