What 𝚒 means
It is the Latin lowercase letter i in a fixed-width mathematical style. Monospace means each character takes the same width. In an equation, the style can distinguish symbols, but the equation’s notation decides what this i stands for.
Older character sets already included isolated letter-shaped math symbols such as ℝ, the sign for the real numbers. The mathematical alphabets extended that small set, letting plain text preserve a wider range of letter-style distinctions in formulas.
Part of the collection
What it means when someone sends it to you
2 readingsA variable or named object whose role follows the equation’s notation.
Don't confuse it with
1Related characters
2
Questions people ask
2Why does 𝚒 appear as a box?
The selected font may lack its glyph. A font that covers mathematical alphanumeric characters can render it; a missing-glyph box is a display issue, not a changed character.
Can 𝚒 turn into a plain i?
Yes. NFKC or NFKD compatibility normalization maps mathematical font variants to their base letters; here that is i. Software that applies either form removes the style distinction.
More like this
12
iLatin Small Letter I𝙸Mathematical Monospace Capital I𝚤Mathematical Italic Small Dotless I𝘪Mathematical Sans-Serif Italic Small I𝚐Mathematical Monospace Small G𝚑Mathematical Monospace Small H𝚓Mathematical Monospace Small J
µMicro SignʹGreek Numeral Sign
ـArabic Tatweel℀Account Of℁Addressed To The SubjectHow to type or find 𝚒
- Search it as
- monospace i · math i · typewriter i · mathtt
- Shows up in
- Anything that takes text · its shape is whatever your font draws
𝚒\1D6921D692 and press Alt+X; if it touches other hex digits, select only that code first.𝚒 in HTML to insert this exact character.\mathtt{i} in math mode for a monospace i; LaTeX typesets the style, so it may not produce this exact Unicode character.Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.