What 〈 means
Use ⟨ for mathematical formulas.
Angle brackets developed into a family of punctuation and technical marks: linguists use them around graphemes (written units), East Asian punctuation uses related shapes around titles, and technical fields group expressions.
Unicode treats 〈 as equivalent to East Asian 〈 and classifies it as wide, so it can take extra horizontal space in formulas. Bra–ket notation writes quantum states; its left form is ⟨ψ|.
A specialist mark for technical and mathematical notation.
Use ⟨ in formulas; 〈 is East Asian wide and may disrupt spacing.
Don't confuse it with
3Questions 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 〈
〈\2329Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

