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From: anita@chopin.udel.edu (Anita Marie Hoover)
Newsgroups: comp.text.tex
Subject: Re: (LaTeX) Re: Help changing equation number brackets.
Keywords: LaTeX
Message-ID: <16222@chopin.udel.edu>
Date: 15 Jan 91 18:33:03 GMT
References: <1991Jan9.173130.3309@ecf.utoronto.ca> <11208@helios.TAMU.EDU>
Distribution: na
Organization: University of Delaware
Lines: 32

In article <11208@helios.TAMU.EDU> jdm5548@diamond.tamu.edu (James Darrell McCauley) writes:
>In article <1991Jan9.173130.3309@ecf.utoronto.ca>, aerostr@ecf.toronto.edu (W. Graham Elliott) writes:
>|> How can the curved brackets around equation numbers (eg. (14) )
>|> be changed to square brackets (eg. [14] )?
>
>I thought that changing \def\@eqnnum{{\rm (\theequation)}}
>to \def\@eqnnum{{\rm [\theequation]}} 
>or \def\@eqnnum{{\rm \left[\theequation\right]}} 
>would work, but it didn't.  Could a someone explain?
>--- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
>James Darrell McCauley, jdm5548@diamond.tamu.edu, jdm5548@tamagen.bitnet
>Dept of Ag Engineering, Texas A&M Univ, College Station, TX 77843-2117, USA
>- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Because of the @ in the name \@eqnnum, you have to LaTeX to treat this
as a letter.  So you must put \makeatletter and \makeatother around
any definitions that have @ in them.

SO in the preamble area,

\documentstyle [12pt] {article}
\makeatletter
\def\@eqnnum{{\rm [\theequation]}}
\makeatother
\begin{document}
...
\end{document}

You will find this works correctly -- you were not too far off.  

Anita Hoover
University of Delaware