How to refer to the number of an item in an enumerate environment inside a theorem

Question

I have something that looks like this:

\usepackage{amsmath}
\begin{document}
\begin{thm}
The following are true:
\begin{enumerate}
\item \label{foo} Foo
\item \label{bar} Bar
\item \label{baz} Baz
\end{enumerate}
\end{thm}

Refer to Theorem \ref{bar}

\end{document}

Right now, the reference to bar shows up as Theorem 1. I want it to show up as Theorem 1.2. Is there any way to do that? To give a sub-numbering to each label within a theorem?

Answer 1

I agree with Jubobs comment: using "Theorem 1.2" is very likely to be confusing.

Here's how one might do:

\documentclass{article}
\usepackage{enumitem}

\newenvironment{thmenum}
 {\begin{enumerate}[label=\upshape(\arabic*),ref=\thethm(\arabic*)]}
 {\end{enumerate}}

\newtheorem{thm}{Theorem}

\begin{document}
\begin{thm}
The following are true:
\begin{thmenum}
\item \label{foo} Foo
\item \label{bar} Bar
\item \label{baz} Baz
\end{thmenum}
\end{thm}

Refer to Theorem \ref{bar}

\end{document}

I'd give the items a distinctive numbering, so that it will be clearer that "Theorem 1(2)" refers to statement 2 in theorem 1.