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\documentclass{aip-cp}

\usepackage[numbers]{natbib}
\usepackage{rotating}
\usepackage{graphicx}

\newtheorem{theorem}{Theorem}
\newtheorem{conjecture}{Conjecture}
\newtheorem{define}{Definition}

\begin{document} 

\begin{theorem}  Let $t(G)= \mathrm{something \  dummy} $. Then 
    \begin{enumerate}
    \item $t(P_r)=r$; 
    \item $t(K_m \times P_r)= r+1 \ \mathrm{for} \  m \geq 2$;
    \end{enumerate}
    \end{theorem}
\end{document}

Hi, as above.

How can i make the the numbering and the text "something dummy " and "for" as normal text n non-italic?

Thank you.

lockstep
  • 250,273
Sara
  • 61
  • For the first, why don't you just put the closing $ before something dummy? For the second, if you are loading mathtools or amsmath, try \text{for}. Otherwise \mathrm{for} for serif or \mathsf{for} for sans. – cfr Aug 08 '15 at 00:04
  • \mathrm{} is really for upright serif which is maths. So \text{} would definitely be better here if you are really typesetting text. – cfr Aug 08 '15 at 00:18
  • Hi, \mathrm{for} works well. But what about the numbering? and \text{ } does not work. – Sara Aug 08 '15 at 00:18
  • Since we don't even know how the theorem environment is defined, how should we comment on the numbering? If you could provide a complete example (\documentclass... \end{document}), we'd be more help. – cfr Aug 08 '15 at 00:21
  • The numbering is consistent with the surrounding text. If you wish to change this, you can use enumitem or issue \rmfamily before the enumerate environment. – Werner Aug 08 '15 at 00:22
  • Hi, I edited the text and includes the theorem environment. I am sorry if this is correct. Still very new to it, – Sara Aug 08 '15 at 00:28

1 Answers1

4

With enumitem use this code:

\begin{enumerate}[label=\arabic*,font=\upshape]
\item …
\end{enumerate}

Or even, if you don't want to have to type the optional argument each time, add this to your preamble:

\usepackage{enumitem}
\usepackage{etoolbox}
\AtBeginEnvironment{theorem}{\setlist[enumerate,1]{label=\arabic*,font=\upshape}}
Bernard
  • 271,350