What 𝒴 means
The surrounding formula defines it. Mathematical notation uses letter styles to distinguish variables; script sets this Y apart from plain Y. A 1991 catalogue of named characters for scientific and mathematical documents already listed “Yscr.” Unicode added its larger mathematical alphabets in 2001 to preserve these distinctions in plain text. The exact strokes can vary by font.
Intended for mathematical and technical notation, not ordinary text styling.
NFKC can turn 𝒴 into plain Y; NFKD does the same, erasing the script distinction.
Part of the collection
Don't confuse it with
2
Related characters
1
Questions people ask
1Why does 𝒴 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.
More like this
11
How to type or find 𝒴
- Search it as
- script y · calligraphic y · curly y · mathcal y · mathscr y
- Shows up in
- Anything that takes text · its shape is whatever your font draws
𝒴\1D4B4Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.