[texhax] Equations ...

Jeff Barnett jbarnett at godzilla.nrtc.northrop.com
Mon Jul 14 10:58:07 CEST 2003


"Harish S. Bhanderi" wrote:

> Hi Manoj and Herbet,
>
> Many thanks for your email. I apologies for not being explicit about the
> problem and so I don't want to reset any counters in Appendix or anything
> like that. The problem is:
>
> I have written an equation in the introduction. In the dvi output, it is
> numbered 1.64, say. Now in the appendix, I want to refresh the reader's
> mind and rewrite the same equation. As it not a new equation, I wanted it
> numbered 1.64 rather than A-73, say. I have seen this sort of thing done
> in books but I don't know how to do it. Please advise.
>
> Many thanks in advance.
>
> Harish
>
> |--> On Mon, 14 Jul 2003, Manoj Kummini wrote:
> |-->
> |-->  Your problem is not very clear. Do you want to number equations in
> |-->  Appendix A as 1.1, 1.2 etc instead of A.1, A.2 etc? If that is what
> |-->  you want, you should probably add something like
> |-->
> |-->  \makeatletter
> |-->  \renewcommand{\theequation}{\@arabic\c at section.\@arabic\c at equation}
> |-->  \makeatother
> |-->
> |-->  in your document. This will however give you an equation in Section 1
> |-->  and another in Appendix A with the same number.
> |-->
> |-->  Manoj.
> |-->
>
> |--> On Mon, 14 Jul 2003, Herbert Gintis wrote:
> |-->
> |-->  I don't know how you produce (1.1), but here's one way, and one
> |-->  way to repeat it later:
> |-->
> |-->  ----------------------
> |-->  \makeatletter
> |-->  \def\@eqnnum{{\normalfont \normalcolor (\thesection.\theequation)}}
> |-->  \makeatother
> |-->  \def\mysection#1{\setcounter{equation}{0}\section{#1}}
> |-->  \begin{document}
> |-->
> |-->  \mysection{Introduction}
> |-->
> |-->  \begin{equation}
> |-->  A = B
> |-->  \end{equation}
> |-->
> |-->  \mysection{New Section}
> |-->
> |-->  \begin{equation}
> |-->  A = B
> |-->  \end{equation}
> |-->
> |-->  Later on...
> |-->
> |-->  \mysection{Appendix}
> |-->  \setcounter{section}{1}
> |-->  \begin{equation}
> |-->  A = B
> |-->  \end{equation}
> |-->  ----------------------------------
> |-->
> |-->  Herbert Gintis
> |-->
>
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If you are use the AMS style, you can use something like \tag{\label{prev}} in
any of the equation environments to make an explicit equation label. In this
example, prev is the label given to the equation when it originally appeared.

-- Jeff Barnett



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