Automatically not emphasizing references inside propositions

Question

Is there a way to make reference not emphasized in proposition ?

For propositions I used the standart AMS packages, so everything is emphasized in it. Thus, when I insert a reference, it also displays an emphasized number, i.e. "(1)". But I don't want it to be emhpasized. Now of course I could use \emph{\ref{...}} inside to proposition so that the two emphaszing command annihilate each other and the reference is displayed as "(1)", but I wouldn't want to do that, since it a big document that gets tedious.

Answer 1

This is as easy as \usepackage{upref}

\documentclass{amsart}
\usepackage{upref}

\newtheorem{Theorem}{Theorem}

\begin{document}

\begin{Theorem}\label{T:One}
  This is an important result.
\end{Theorem}

\begin{Theorem}
  This result is not as important as~\ref{T:One}.
\end{Theorem}

Here is a normal \ref{T:One}.
\end{document}

Answer 2

I'm a little confused by your question because \ref{} will produce 1 with emphasis, but without brackets (1), whereas \eqref{} produces (1) without emphasis. That is, neither of them will lead to (1) being typeset with emphasis... perhaps this is a function of the other packages that you are using? (This is one of the reasons why it is good to always supply a minimal working example .)

As \eqref{} already does what you want I'll show one way of making \ref{} print 1 without using emphasis. You said that you were using AMS packages so I have used amsart as the documentclass. In this case theorem are, ultimately, produced by \@begintheorem so I redefine this so that it defines \ref to remove (or rather add) emphasis inside a theorem-ike environment.

Here is some example output:

and here is the code:

\documentclass{amsart}

\makeatletter% we need this to change the definition of \@begintheorem
\let\real@begintheorem=\@begintheorem% save real AMS theorem environment
\let\real@ref=\ref
\def\@begintheorem#1#2[#3]{%
    \real@begintheorem{#1}{#2}[#3]% start the theorem
    \def\ref##1{\emph{\real@ref{##1}}}% overwrite \ref INSIDE a theormem
}
\makeatother

\newtheorem{Theorem}{Theorem}

\begin{document}

\begin{Theorem}\label{T:One}
  This is an important result.
\end{Theorem}

\begin{Theorem}
  This result is not as important as~\ref{T:One}.
\end{Theorem}

Here is a normal \ref{T:One}.
\end{document}

Of course, we could instead use the \patchcmd from etoolbox to change \@begintheorem but this will end up doing much the same thing as above (after first loading a lot of the commands).