[texhax] Nested commands, Matrix labels

[Lars Madsen]

Lloyd  :

> I have two problems, both in LaTeX .
>
>
>
> 1.       I'm trying to bold a subscripted symbol which is also an element in
> a matrix.  I tried this with:
>
>
>
> \mathbf{\beta}, but it simply doesn't work.  Any ideas here?
>

not all symbols exists in a bold version.

Try:

\usepackage{bm}

\bm{\beta}

\bm will simulate bold if needed.

BTW: \mathbf does not work on symbols anyway, only uppercase greek letters 
(which is why the bm package is recommended)


>
>
>            2.  How to I assign an equation number to a matrix equation?   I
> know I can assign "equation" numbers to rows in an array, but that's not
> what I want.  But I'm not opposed to using  the array setup to get the job
> done.
>

I don't quite follow, are you looking for a way to simply have a few 
matrices and an equation number?
(assuming the amsmath package)


\begin{equation}
\begin{pmatrix}
a_{11} & a_{12} \\ a_{21} & a_{22}
\end{pmatrix}
\begin{pmatrix}
b_{11} & b_{12} \\ b_{21} & b_{22}
\end{pmatrix}
=
\begin{pmatrix}
b_{11} & b_{12} \\ b_{21} & b_{22}
\end{pmatrix}
\end{equation}


--

/daleif

``You cannot help men permanently by doing for them 
what they could and should do for themselves. ''
  -- Abraham Lincoln