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I want to use a custom tag for some equations, but I'm not being allowed to. Here is an MWE:

\documentclass{article}

\usepackage{amsmath,cases}


\begin{document}
    \begin{equation}
        x=y\tag{custom1}\label{eq:1}
    \end{equation}
    \begin{numcases}{}
        x=y \tag{custom2}\label{eq:2}
    \end{numcases}
    Why can I do \eqref{eq:1}, but not \eqref{eq:2}?
\end{document}

This produces the following output:

enter image description here

Naturally I'd like the second \eqref to display as (custom2).

Luke Collins
  • 1,910
  • 1
    https://tex.stackexchange.com/a/201450/134144 might be interesting. – leandriis Jan 14 '21 at 21:24
  • @leandriis I have not understood the question :-) as usual :-) – Sebastiano Jan 14 '21 at 21:26
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    This appears to be a bug @DonaldArsenau It looks like a timing issue with the \tag environment and when \@currentlabel gets defined. I'm not sure if the bug is also in amsmath or not. – Don Hosek Jan 14 '21 at 22:43

0 Answers0