# [texhax] math bold not extended?

Philipp Stephani st_philipp at yahoo.de
Fri Apr 8 12:24:58 CEST 2011

Am 08.04.2011 um 11:53 schrieb Michael Barr:

> I am trying to define a command \mathbi that will produce an ordinary bold math character.  The command
> \DeclareMathAlphabet{\mathbi}{OT1}{cmr}{bx}{it}
> makes an extended bold character.  From the Companion, I glean the fact that \mathbold (or \mathversion{bold}) changes the math alphabet to such a font, but I cannot find how to define \mathbi as I want it.

Hello,

did you try the bm package? It supports boldening of almost arbitrary math expressions. Otherwise the declaration
\DeclareMathAlphabet{\mathbi}{OML}{cmm}{b}{it}
should work.