# How to make the numbering of items non-italic in a theorem environment

Is there a way to make the numbering of items non italic. To to be specific in the following example I would like that (v) becomes non italic (italic blablabla is fine).

\documentclass{article}
\usepackage{amsthm}

\newtheorem{thm}{Theorem}

\begin{document}

\begin{thm}
\begin{enumerate}
\item[(v)] blablabla
\end{enumerate}
\end{thm}

\begin{thm}
\begin{itemize}
\item[(v)] blablabla
\end{itemize}
\end{thm}

\end{document}

• Use enumitem to control all lists. You can make the default label for enumerate upright. Also you should not be numbering items manually, again learn to use enumitem, it will make life a lot easier. If you are adamant that this should only hit theorem, you can use features from the etoolbox package to add enumitem configurations to all theorem envs – daleif Nov 27 '16 at 10:59
• Thank you, as explained in tex.stackexchange.com/questions/100521/… using \usepackage{enumitem} \setlist[enumerate]{label={\upshape(\roman*)}} one can enumerate upright. Unfortunately in this circumstance, I should enumerate manually. – Name Nov 27 '16 at 12:58
• Please explain why manual? – daleif Nov 27 '16 at 13:04
• In my situation I would like to have Theorem 1. item 1 item 2, Theorem 2 item 3 item 4 item 5 etc. – Name Nov 27 '16 at 13:28

You can use the start key of enumitem or, better, the series key which makes all enumerate environments in a series to have the same layout and share the same counter. Here I use a thmenum series. Note you may have as many series as you please.

\documentclass{article}
\usepackage{amsthm}
\usepackage{enumitem}%
\newtheorem{thm}{Theorem}
\usepackage{etoolbox}
\AtBeginEnvironment{thm}{\setlist[enumerate, 1]{font=\upshape, nosep,  wide=0.5em, before=\leavevmode}}

\begin{document}

\begin{thm}
\item Blablabla
\item Bliblibli
\end{enumerate}
\end{thm}

\begin{thm}

• The most funny part was Blablabla, Bliblibli, Blobloblo. :) – Name Nov 27 '16 at 14:53