What ⋒ means
⋒ is an intersection operator; its exact role depends on the notation.
The name double cap describes the symbol’s shape; it does not tell you to apply the ordinary ∩ twice. Check the author’s definition in the surrounding text.
A font may draw ⋒ with different strokes or spacing, but those display changes do not change the character.
This is specialized mathematical notation; the text using it needs to define its role.
Don’t assume the double cap means to apply ∩ twice.
Don't confuse it with
1Questions people ask
1Why does ⋒ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ⋒
Windows (Word)
Alt+XType 22D2, 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 “double intersection”.
Linux
Ctrl+Shift+UType 22d2, then Enter or Space.
HTML
⋒CSS
\22D2Microsoft Word
As of 2026, enter \Cap in Word’s equation editor; it converts the command to ⋒.
Codes and encoding1 code points
HTML decimal
⋒
HTML hex
⋒
CSS content
content: "\22D2";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%8B%92
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.