What ⫐ means
A ⫐ B means A is a superset of B. “Superset” means every member of B belongs to A; A may contain additional members. In this notation, “closed” does not encode one extra condition across all mathematical settings; follow the definition attached to the formula.
Formal notation for mathematical relations.
Don't confuse it with
1Questions people ask
1Can every LaTeX document use \csup?
No. The command works only when the loaded math package defines it.
How to type ⫐
Windows (Word)
Alt+XType 2AD0, then Alt+X to get ⫐.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “closed superset”.
Linux
Ctrl+Shift+UType 2ad0, then Enter or Space.
HTML
⫐CSS
\2AD0LaTeX csup
Use the \csup command in math mode with a package that defines it.
HTML: ⫐
Use the named character reference in HTML, or insert the Unicode character directly.
Codes and encoding1 code points
HTML decimal
⫐
HTML hex
⫐
CSS content
content: "\2AD0";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%AB%90
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
