Path: utzoo!censor!geac!torsqnt!lethe!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!sdd.hp.com!ucsd!ucbvax!bloom-beacon!eru!hagbard!sunic!dkuug!iesd!iesd.auc.dk!krab
From: krab@iesd.auc.dk (Kresten Krab Thorup)
Newsgroups: comp.text.tex
Subject: QED sign at end of \eqnarray
Message-ID: <KRAB.91Jan11163307@red.iesd.auc.dk>
Date: 11 Jan 91 16:33:07 GMT
Sender: news@iesd.auc.dk (UseNet News)
Distribution: comp
Organization: Mathematics and Computer Science, University of Aalborg
Lines: 43


This problem can be solved by redefining the `\theequation' macro,
to let it produce a box, and letting the `\stepequation' be a null-
macro. Insert this in your preamble...

\def\makeqed{%
	\def\stepcounter#1{}%
	\def\theequation{\rule[2pt]{5pt}{5pt}}%
	}

As an equation array is a TeX-`group', using the new command \makeqed
will put `QED'-marks at the right of all equations from where it
placed, and to the end of that array.

Let's have an example:

\begin{eqnarray}{rl}
	Math & formula \\
	more math & more math \makeqed
\end{eqnarray}

which produces somewhat like:

                          Math  formula                (2.13)
 	 	     more math  more math                  []

Please dont blame me if it doesn't work...

I hope you can use this
 
/Kresten

--

        (  .                     
      (. )  )                    
       ) ( (                     
    .________.                   <krab@iesd.auc.dk>
    | |    __|                   
    |       ))                   Kresten Krab Thorup
    | |    //|                   Institute for electronic systems
`---`-`------'---'               Dept. of mathemathics and computer science
Coffee - coffee - coffee ....    Aalborg University - Denmark, EC