What 𝚂 means
It is a style-marked S; the formula gives it a role.
Mathematical notation uses letter styles to distinguish symbols. A 1999 proposal for mathematical alphabets records their use in published mathematics and science, and argues that plain text should preserve their separate meanings. Monospace was one style in the proposed set.
Part of the collection
Don't confuse it with
1Questions people ask
1Why did 𝚂 turn into S?
Compatibility normalization can do that. It is a text conversion that reduces mathematical letter styles to base letters, so 𝚂 can become ordinary S and lose its distinction.
How to type or find 𝚂
- Search it as
- monospace s · typewriter s · math monospace · fixed-width s
- Shows up in
- Anything that takes text · its shape is whatever your font draws
𝚂\1D682𝚂 in the source; the browser renders that numeric reference as the character.Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.




