What ⋔ means
It marks proper intersection; topology also uses it for transverse meeting.
Diophantus used a similar fork-shaped mark in Arithmetica, an early algebra text, to separate terms being subtracted. That older notation resembles ⋔ but is not this exact character.
What it means when someone sends it to you
2 readingsBetween sets in set theory
Proper intersection; follow the author's definition.
Map and submanifold in topology
Transversality: a map meets a submanifold (a smooth part of a space) transversely.
Questions people ask
1Why is ⋔ missing or shown as a box?
Your font may lack this text glyph; try one with broad mathematical coverage.
How to type ⋔
Windows (Word)
Alt+XType 22D4, 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 “pitchfork”.
Linux
Ctrl+Shift+UType 22d4, then Enter or Space.
HTML
⋔CSS
\22D4Linux
Press Ctrl+Shift+U, type 22D4, then press Enter.
Windows
In Word, type 22D4 then press Alt+X; support varies by app.
Codes and encoding1 code points
HTML decimal
⋔
HTML hex
⋔
CSS content
content: "\22D4";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%8B%94
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.