Consider:
I would like to know the LaTeX command for the symbol above. I searched for it online and tried Detexify, but I could not find it.
3 Answers
\documentclass{article}
\usepackage{bbm}
\begin{document}
$\mathbbm{i}$
\end{document}
One drawback, of course is that the bbm fonts are bitmapped. There is a scalable alternative with the STIX fonts, but it looks slightly different.
\documentclass[border=10]{standalone}
\usepackage{amsmath}
\DeclareFontEncoding{LS1}{}{}
\DeclareFontSubstitution{LS1}{stix}{m}{n}
\newcommand{\bbi}{\text{\usefont{LS1}{stixbb}{m}{n}i}}
\begin{document}
$\bbi$
\end{document}
answered Apr 21, 2022 at 1:14
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May I know why you not recommend about the
\mathbbtag? Please advise...– MadyYuviApr 21, 2022 at 3:25 -
3@MadyYuvi That only has blackboard bold capital letters (ABC…), not lowercase (ABC…).– dbmag9Apr 21, 2022 at 7:45
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3(For the confused, my comment above was written on my phone which autocorrected 'abc' to 'ABC' rather unhelpfully.)– dbmag9Apr 22, 2022 at 10:40
If you have the option to use unicode math, you can also use \Bbbi (U+1D55A) or \mitBbbi (U+02148) for the italic one (Thanks to Ingmar who pointed this out). Below you see the result in some of the commonly used fonts. If the font does not have it a question mark is shown.
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2Isn't it U+2148, though? And that's DOUBLE-STRUCK ITALIC SMALL I, which may or may not be what OP needs.– IngmarApr 21, 2022 at 5:10
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1
There is Unicode character U+1D55A (MATHEMATICAL DOUBLE-STRUCK SMALL I). If you
use a TeX-engine that allows you to use arbitrary fonts (like LuaLaTeX) and have a font that supports the glyph, you could use 𝕚 directly, as it were.
