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I am getting the following error, but cannot figure out the problem yet
! LaTeX Error: No counter 'theorem' defined.
I have
\newtheorem{galex-theorem}{Theorem}[section]
\newtheorem{galex-corollary}{Corollary}[theorem]
which could be problematic, but I cannot see it clearly.
As the error states you have not defined theorem however you have defined galex-thorem so I assume you intended that. (You give no indication of your intended output)
\documentclass{article}
\newtheorem{galex-theorem}{Theorem}[section]
\newtheorem{galex-corollary}{Corollary}[galex-theorem]
\begin{document}
\section{hmmm}
\begin{galex-theorem}
$1=0$
\end{galex-theorem}
\begin{galex-corollary}
everything is provable
\end{galex-corollary}
\begin{galex-theorem}
a new theorem
\end{galex-theorem}
\begin{galex-corollary}
corollary 1 (again) as reset by galex-theorem
\end{galex-corollary}
\begin{galex-corollary}
corollary 2
\end{galex-corollary}
\end{document}
galex-theorem. You got the result I have been working to do.
\newtheorem where users do construct their own theorem related categorisations?
[theorem]there?galex-theorem.\newtheorem{galex-theorem}{Theorem}[section]. I think one can number per theorem but[theorem]is not being recognised. Perhaps a different keyword should be used for such a thing.theorembut first you need to definetheorem, so far you have only definedgalex-theorem