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

Information and discussion about fonts and character sets (e.g. how to use language specific characters)
haaj86
Posts: 21
Joined: Mon Apr 06, 2009 11:18 pm

### Identity Matrix Symbol (double ones)

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.

Last edited by haaj86 on Sat Aug 21, 2010 5:29 pm, edited 1 time in total.

gmedina
Posts: 2313
Joined: Wed Jul 11, 2007 11:45 pm
Location: Colombia
Hi,

which symbol do you want exactly? Can you please provide a link to the exact symbol you're trying to find?
1,1,2,3,5,8,13,21,34,55,89,144,233,...

haaj86
Posts: 21
Joined: Mon Apr 06, 2009 11:18 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 67126 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).

josephwright
Site Moderator
Posts: 814
Joined: Tue Jul 01, 2008 2:19 pm
Contact:
Detexify says
\documentclass{article}\usepackage{bbold}\begin{document}$$\mathbb{1}$$\end{document}
Joseph Wright

haaj86
Posts: 21
Joined: Mon Apr 06, 2009 11:18 pm
Thanks Joseph! This is precisely what I'm looking for.