[comp.text.tex] HELP! How to get bold $ \sigma $ ?

hong@sci.kun.nl (Hong Zhou) (05/30/91)

Hi, 
I have been    trying to get bold $ \sigma $
with $ {\bf \sigma} $ as well as $ {\boldmath   \sigma} $
in LaTeX. But they don't work. Does anybody have 
any idea? Any suggestion is welcome.

hong@macrinus.mbfys.kun.nl

smagt@fwi.uva.nl (Patrick van der Smagt) (05/30/91)

hong@sci.kun.nl (Hong Zhou) writes:

>Hi, 
>I have been    trying to get bold $ \sigma $
>with $ {\bf \sigma} $ as well as $ {\boldmath   \sigma} $
>in LaTeX. But they don't work. Does anybody have 
>any idea? Any suggestion is welcome.

I use the following code for all my bold stuff (designed them myself
so much room for improvement):

\def\bm#1{%
  \mathchoice%
       {\setbox1=\hbox{$#1$}\dobm}
       {\setbox1=\hbox{$#1$}\dobm}
       {\setbox1=\hbox{\scriptsize$#1$}\dobm}
       {\setbox1=\hbox{\tiny$#1$}\dobm}
}
\def\dobm{
    \copy1\kern-\wd1\kern0.05ex\copy1\kern-\wd1\kern0.05ex\box1
}



So you can do the following:

$$
	\bm{\displaystyle\sum_{i=0}^N} ...
$$

						Patrick van der Smagt

bkph@rice-chex.ai.mit.edu (Berthold K.P. Horn) (05/31/91)

Bold greek letters are in the cmmbi10 font.

If you are using LaTeX, look on page 53 of the manual.  
You need to use \mbox and $...$ in ADDITION to \boldmath:

	\mbox{\boldmath $\sigma$} 

For some reason many people have gotten into the habit if overprinting using
\kern.  This is neither necessary nor desireable.  In fact, it looks pretty
bad if your output should ever go to a device with reasonable resolution...

krab@iesd.auc.dk (Kresten Krab Thorup) (05/31/91)

>>>>> On 30 May 91 14:49:47 GMT, hong@sci.kun.nl (Hong Zhou) said:

Hong> Hi, 
Hong> I have been    trying to get bold $ \sigma $
Hong> with $ {\bf \sigma} $ as well as $ {\boldmath   \sigma} $
Hong> in LaTeX. But they don't work. Does anybody have 
Hong> any idea? Any suggestion is welcome.

Try:

	$ \alpha \mbox{\boldmath$ \sigma $} \tau $

\boldmath should only be used in text (non-math) mode!  :-)

/Kresten Krab Thorup