Fonts & Character Sets

haaj86 · Post by **haaj86** » Sat Aug 21, 2010 1:40 pm

Hi, how to type the identity matrix symbol (the double ones). I don't mean the

\mathbb{I}

symbol.

I can't also find it in the The Comprehensive LATEX Symbol List.

Please help!

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gmedina · Post by **gmedina** » Sat Aug 21, 2010 3:30 pm

Hi,

which symbol do you want exactly? Can you please provide a link to the exact symbol you're trying to find?

haaj86 · Post by **haaj86** » Sat Aug 21, 2010 4:13 pm

To be honest I usually use the big "I" to represent the indentity and most books uses this one. But I remember seeing this one:

: identity.png (850 Bytes) Viewed 253822 times

I drew this with paint because I can't find a webpage that uses it.

Thank you!

Edit by localghost: No external links (see Board Rules)! Attachments go onto the forum server (where applicable).

Post by **josephwright** » Sat Aug 21, 2010 5:07 pm

Detexify says

Code: Select all

\documentclass{article}
\usepackage{bbold}
\begin{document}
\(  \mathbb{1} \)
\end{document}

haaj86 · Post by **haaj86** » Sat Aug 21, 2010 5:29 pm

Thanks Joseph! This is precisely what I'm looking for.

LaTeX.org

Fonts & Character Sets ⇒ Identity Matrix Symbol (double ones)

Identity Matrix Symbol (double ones)

Re: Identity Matrix Symbol (double ones)

Identity Matrix Symbol (double ones)

Identity Matrix Symbol (double ones)

Re: Identity Matrix Symbol (double ones)