I am using the ACM SIG alternate style, which automatically converts all section titles to upper case. I would like to include a reference in one of the section titles (Proof of Lemma X). The obvious way (shown in the MWE below) results in the following warning:
LaTeX Warning: Reference `SEC:INTRODUCTION' on page \thepage undefined on input line 9.
Apparantly the argument of \ref
is converted to upper case before the reference is generated. Is there a way to fix this without changing the label to upper case?
\documentclass{sig-alternate}
\begin{document}
\section{Introduction}
\label{sec:introduction}
The introduction.
\section{The section after Section~\ref{sec:introduction}}
\end{document}
\protect
prior to the\ref
help?