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Similar to an old 2011 posting here, I would like to manually tag a particular line of equation with number in Beamer. I tried using \tag{} command but it does not work, putting in \usepackage{amsmath} also does not help. I am working under these environments:

\documentclass{beamer} 
\mode {
\usetheme{Ilmenau}
\usecolortheme{beaver}}

And here is a compilable example from my slides:

$x = r \cos \theta \tag{1}$.

Here, ShareLatex ignores \tag{1} but compiles the rest of the equation correctly.

Please advise and thanks for your time.

PS.: I do not have any need to reference the tagged equation later.

Community
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A.Magnus
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  • Could you please provide a compilable minimal working example? – Herr K. Apr 24 '15 at 19:53
  • @HerrK. Thanks for your suggestion. See the above for compilable example. Thanks again. – A.Magnus Apr 24 '15 at 20:32
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    Welcome to TeX.SX! Please make your code compilable (if possible), or at least complete it with \documentclass{...}, the required \usepackage's, \begin{document}, and \end{document}. That may seem tedious to you, but think of the extra work it represents for TeX.SX users willing to give you a hand. Help them help you: remove that one hurdle between you and a solution to your problem. A tip: You can use backticks ``` to mark your inline code as I did in my edit. – adn Apr 24 '15 at 20:45

1 Answers1

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After a small correction of (first version of) your code:

\documentclass{beamer}

\usetheme{Ilmenau}
\usecolortheme{beaver}

\begin{document}

\begin{equation}
1+1=2
\end{equation}

\begin{equation}
1+1=2 \tag{mytag}
\end{equation}

\end{document}

enter image description here

The source of your problem seems to be inline formula, i.e. between dollar signs, not inside, say, equation environment.

Przemysław Scherwentke
  • 37,268
  • Thank you! Let me work on it and will get back with you if there is still any issue. Thanks again. – A.Magnus Apr 24 '15 at 21:48
  • I am not sure I understand your last comment. Did you say that \tag{ } can not be used between dollar signs? Since I have to use dollar signs, what should I do to manually number an equation? Thanks again. – A.Magnus Apr 25 '15 at 11:33
  • @A.Magnus Using \tag simply between dollars your should obtain amsmath error \tag not allowed here. Your \tag should be in a place, where the behaviour is as between double dollars, e.g. \[ 2\tag{second}\]. – Przemysław Scherwentke Apr 26 '15 at 17:58