# [texhax] Q: bold variables in math mode

D. R. Evans doc.evans at gmail.com
Tue May 31 21:21:34 CEST 2011

I need to be able to typeset something like:
A = CM
in math mode where A and M are bold, but C is roman.

As long as I don't redefine \bf, then the following works:
${\bf A} = {\rm C} {\bf M}$

But I have:
\font\bf=ec-lmbx12 at 10.5pt
and now when I type the math mode expression, A, C and M are all rendered
in math italic instead of bold.

How do I get A and M to render in the bold face I am defining with the
above \font\bf command?

Doc

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Web:  http://www.sff.net/people/N7DR

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