Message-Id: <9209281643.AA11380@sc.zib-berlin.dbp.de>
Reply-To: Mailing list for the LaTeX3 project <LATEX-L@vm.urz.Uni-Heidelberg.de>
Date:         Mon, 28 Sep 92 12:19:55 EDT
From: Peter Bloomfield <bloomfld@STAT.NCSU.EDU>
Sender: Mailing list for the LaTeX3 project <LATEX-L@vm.urz.Uni-Heidelberg.de>
To: Multiple recipients of <LATEX-L@vm.urz.Uni-Heidelberg.de>
Subject:      Converse of \nonumber
Status: R


Are there plans to implement a converse of \nonumber in LaTeX3?  I
often find the need to add, and refer to, an equation number to an
equation that I initially entered in an unnumbered environment
(displaymath or eqnarray*).  Changing the environment and adding a
\label{...} is straightforward, but tedious (and error-prone: I don't
always match up \begin's and \end's correctly!).  It would be simpler
if I could use a converse to \nonumber and add the \label{...}.
However, the present coding of these environments seems to preclude
this.

Actually, it would be simpler yet if inserting \label{...} were enough
by itself.  I have experimented with an environment based on eqnarray
in which this seems to work (by redefining \label), which I now use for
all my equations, even single line equations.  On reflection, this was
unnecessary, as I could easily define a single command (perhaps
\labeleqn{...}) that carried out both actions.

Finding a name for the converse is a minor problem, as \number is
already spoken for, and \nononumber is unacceptable.  Perhaps
\numbereqn?

I'd be interested to hear any comments.

Peter Bloomfield