Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!udel!brahms.udel.edu!anita
From: anita@brahms.udel.edu (Anita Marie Hoover)
Newsgroups: comp.text.tex
Subject: Re: Latex Help: Equation numbering format
Message-ID: <20247@brahms.udel.edu>
Date: 8 Apr 91 14:24:40 GMT
References: <1991Apr7.202452.20998@wpi.WPI.EDU>
Organization: University of Delaware
Lines: 23

In article <1991Apr7.202452.20998@wpi.WPI.EDU> llew@wpi.WPI.EDU (Lew Yan Voon) writes:
=>Hi
=>
=>I need urgent help in redefining a latex format.
=>I need to use square brackets to enclose eqn no. instead
=>of ( ).
=>Can it be done in an easy manner, i.e., without having to
=>modify latex.tex or using tex?
=>i can solve the problem for single line displays by
=>using the tex command $$ .... \leqno[...]$$ but
=>$$\leqalignno{... $$ wasn't recognized by latex.
=>
=>thanks,
=>lok.

Yes it can be done in an easy manner!  In the preamble area
(after \documentstyle before \begin{document}), put

\makeatletter
\renewcommand{\@eqnnum}{{\rm [\theequation]}}
\makeatother

This should do the trick.