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I want to put some different symbolic notations after some equations such as $*$, $\dagger$ (see image below), $\ddagger$ etc.

I did the following

\begin{equation*}
a+b=c  \tag{*}
\end{equation*}

Output was as expected:

enter image description here

For next equation, I wanted to use $\dagger$, and I did following:

\begin{equation*}
p+q=r  \tag{\dagger}
\end{equation*}

This produced some errors. I then replaced it in following cheating way:

\begin{equation*}
p+q=r  \tag{ \mbox{ $\dagger$ } }
\end{equation*}

This then showed following output as expected:

enter image description here

Question: So to put the sign of second image, I had to do go in process

[equation mode] --> [ text mode ] -- > [equation mode]

i.e. first \begin{equation}-\end{equation}; inside it use \mbox{ }; inside it use dollar sign. Isn't this a cheating? What should be correct way to put this sign?

closed as unclear what you're asking by Werner, Stefan Pinnow, CarLaTeX, TeXnician, Mensch Apr 21 '17 at 21:23

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • 1
    Just \tag{$\dagger$} will do, no? – Troy Feb 28 '17 at 8:21
  • Have you tried using \renewcommand{\theequation}{\fnsymbol{equation}}? – TeXnician Feb 28 '17 at 8:24
  • @Troy: it was showing errors (I mentioned this; and so finally I did a cheating, which worked!). TeXnician, I have not used it. – p Groups Feb 28 '17 at 8:27
  • Is there any reason why you would want to manually tag them? – TeXnician Feb 28 '17 at 8:29
  • @Troy: sorry; your answer works; actually, when I put dollar sign inside tag, then it showed in red color, so I felt it will be wrong; but it works. Thanks – p Groups Feb 28 '17 at 8:29
1

The argument of the \tag{<label>} command from the amsmath package is in text mode by default. This is why if you try \tag{\dagger}, you get Missing $ inserted-like errors.

If you want to tag them with a mathematical symbol, you need to enclose the symbol in a math environment, like \(...\). The \mbox is not necessary.

\documentclass[]{article}
\usepackage{amsmath}

\begin{document}
    Tagging in text mode: 
    \begin{equation*}
    a+b=c  \tag{*}
    \end{equation*}
    Tagging in math mode (symbols):
    \[
    p+q=r   \tag{\(\dagger\)} % <------- Note the math environment
    \]
\end{document}

simple tagging

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