vertical equivalent of \underbrace and \overbrace

[Sam Als]

Hi;

I would like to generate a matrix like

[ . ] }
| . | |
| H_1 . H_3 | |
| . | > m
| . | |
H= |...................| }
| . | }
| . | |
| H_2 . H_4 | > n
[ . ] }
`---v------'`--v----'
r s

The r and s can be entered using \over and \underbrace, is there a way that
I can enter m and n and the braces?

Thanks in advance.

Sam

[Harvey Greenberg]

I'm sure someone will answer with a more general method, but I think the
following does what you want in this particular case.

\[ \begin{array}{ll}
H = \left[ \begin{array}{ccc} H_1 &
\psline[linestyle=dotted,unit=1cm,dotsep=4pt]{-}(0,.2)(0,-1)
& H_3 \\ \hdotsfor{3} \\
H_2 & & H_4
\end{array} \right] \hspace{-.2in} &
\begin{array}{l} \Big{\}} m \\
\Big{\}} n
\end{array}
\end{array}
\]

In the preamble, you will need \usepackage{amsmath} (for \hdotsfor) and
\usepackage{pst-all} (for the dotted vertical rule).

(There must be a better way to have a dotted vertical rule than to use
PSTricks, but I don't know what it is.)

Thanks,
Harvey
hgre...@carbon.cudenver.edu http://www.cudenver.edu/~hgreenbe/
Check the Tours that I've added to my Mathematical Programming Glossary at
http://www.cudenver.edu/~hgreenbe/glossary/glossary.html

On 30 Apr 2000, Sam Als wrote:

> Date: 30 Apr 2000 13:37:58 GMT
> From: Sam Als <mas...@yahoo.com>
> Newsgroups: comp.text.tex
> Subject: vertical equivalent of \underbrace and \overbrace

[Sam Als]

hgre...@carbon.cudenver.edu (Harvey Greenberg) wrote in
<Pine.OSF.4.10.100043...@carbon.cudenver.edu>:

Your suggestion generates the matrix but I do not see how it generates the
right braces and m and n next to them.

Thanks,

Sam