What 𝒸 means
As of 2026, in GNOME/GTK press Ctrl+Shift+U, type 1D4B8, then press Enter.
What does 𝒸 mean?
It marks a mathematical script letter, not a fixed value.
Mathematical writing treats letter styles as separate alphabets, so script 𝒸 can name something unrelated to plain c in the same formula. Script letters are also called calligraphic. Encoding these styles lets plain text preserve such distinctions.
Some mathematically styled letters were already encoded as separate symbols before the complete mathematical alphabets were added; the larger alphabets leave gaps where those earlier forms already sit.
Don't confuse it with
4Questions people ask
1Why does 𝒸 turn into c?
NFKC normalization maps this character to plain c. That removes its script and mathematical distinction, which can change meaning when the letter is a variable.
How to type 𝒸
𝒸\1D4B8Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.