Closed Subset Or Equal To Symbol
⫑ denotes a closed subset relation or the “subset or equal to” idea in math notation.
U+2AD1
⫑ is a mathematical symbol used to express “closed subset or equal to.” It’s helpful when writing topology or set relation statements with precise meaning. You can copy it directly or use the provided codepoint escapes in HTML, CSS, and JavaScript.
Closed Subset Or Equal To Symbol Meaning
⫑ (U+2AD1) is named “CLOSED SUBSET OR EQUAL TO.” In mathematical writing, it is used to indicate that a set is both related by inclusion and is treated as closed—while also allowing equality. In practice, you may see it in formal topology-style statements where authors want to emphasize that the subset is closed, not just included. If you’re typesetting relationships between sets, ⫑ communicates a stronger condition than a plain subset symbol. It’s generally intended for mathematical contexts rather than general text.
Common uses
- •Express a closed subset relation in topology-style proofs and definitions
- •State that a set is contained in another and the subset is closed (allowing equality)
- •Write formal set inclusion statements in textbooks, notes, and lecture slides
- •Annotate diagrams or definitions where “closed” must be explicitly conveyed
- •Use in LaTeX-like mathematical composition and HTML/Unicode math text
Examples
⫑ Closed subset or equal to
- ⫑A ⫑ X
- ⫑F ⫑ Y
- ⫑K ⫑ C
- ⫑S ⫑ T
- ⫑B ⫑ M
Variations
Ready to copy
Technical codes
| Unicode | U+2AD1 | |
| HTML Entity | ⫑ | |
| HTML Code | ⫑ | |
| CSS | \2AD1 | |
| Alt Code | Alt + 10961 | |
| Decimal | 10961 |
How to type Closed Subset Or Equal To Symbol (⫑)
On Windows
Hold Alt and type 10961 on the numeric keypad. In Word, type 2AD1 then press Alt + X.
On Mac
Switch to the Unicode Hex Input keyboard, then hold Option and type 2AD1. Or press Control + Command + Space and search.
On Linux
Press Control + Shift + U, type 2ad1, then press Enter or Space.
Anywhere
Copy ⫑ with the button above and paste it wherever you need it — this works on every device and in every app, with no keyboard shortcut to remember.
FAQ
What does ⫑ mean?
⫑ means “Closed subset or equal to,” indicating a closed subset relationship that also permits equality.
What is the Unicode code point for ⫑?
The Unicode code point for ⫑ is U+2AD1.
How can I copy ⫑ into HTML or CSS?
Use HTML entity ⫑, CSS escape \\2AD1, or JavaScript escape \\u{2AD1}.
Where should I use this symbol?
It’s best suited for mathematical writing, especially topology and formal set-relation statements.