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From: rsingh@elaine0.stanford.edu (Rajesh Kumar Singh)
Newsgroups: comp.text.tex
Subject: Latex/Tex
Summary: Latex/Tex usage for Partitioned matrices
Keywords: Partitioned Matrices
Message-ID: <1990Nov9.025423.27796@portia.Stanford.EDU>
Date: 9 Nov 90 02:54:23 GMT
Sender: rsingh@portia.stanford.edu (Rajesh Kumar Singh)
Organization: Department of Civil Engineeering, Stanford University
Lines: 26

Hello, netters!

I need some help typesetting partitioned matrices in latex.  Consider 
the following:

	$$ 
	R = 
	\left( 
	\begin{array}{c|c} 
	A & B \\ \hline C & D \\ 
	\end{array}  \right) $$

In the above A, B, C, D are the partitions of R.  The partitioning
is being shown by solid lines (\hline  and |).  My advisor wants them
to be real partitioning symbols, i.e., a thin, dashed line.

Have you used these?  If so, may be you can help me.  I didn't
find anything in LaTeX manual.  Browsing through TeXBook I haven't
found anything so far.  Help!!

--raj
--
---------------------------------------------------------------------  
Rajesh Kumar Singh                 E-mail: rsingh@portia.stanford.edu
      | Dept of Civil Engineering      or  rsingh@cive.stanford.edu 
  W   | Blume Earthquake Center