1

Up until now, whenever I create a new definition or theorem etc., the title (so the word 'Definition' etc.) would come up in bold. However, when I try to add '\theoremstyle{remark}', the titles stop coming up in boldface. Is there any way I can fix this (i.e. so I don't have to bold each title individually as it comes up)? Sorry if this is a stupid question, I'm very new to all this.

user112495
  • 113
  • Yes there is. \theoremstyle sets how theorems will be printed from that point onward, so setting it to something like remark (which doesn't have a bold title will have exactly that effect. Could you provide the community with a use-case in the form of a minimal working example (MWE)? – Werner Dec 11 '14 at 00:50
  • Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. – cfr Dec 11 '14 at 00:52
  • Ah, so at the moment I have the following:

    \theoremstyle{definition} \theoremstyle{theorem} \theoremstyle{corollary} \theoremstyle{proposition} \theoremstyle{lemma} \theoremstyle{example} \theoremstyle{remark}

    \newtheorem{definition}{Definition}[section] \newtheorem{theorem}{Theorem}[section] \newtheorem{corollary}{Corollary}[section] \newtheorem{proposition}{Proposition}[section] \newtheorem{lemma}{Lemma}[section] \newtheorem{example}{Example}[section] \newtheorem{remark}{Remark}[section]

    As remark is one of them, does this make all my theorem non bold?

     – user112495 Dec 11 '14 at 00:54
  • Which theorem package do you use? – Bernard Dec 11 '14 at 01:00
  • @Bernard amsthm – user112495 Dec 11 '14 at 01:01
  • \theoremstyle{remark} won't make bold title, but italic title. –  Dec 11 '14 at 01:05
  • I don't know it well (personally, I use ntheorem), buts, as far as I can remember, if you want to number your remarks, you should use the definition style. If you want unnumbered remarks (and, in addition, an automatic placement of end-of-proof symbol), ntheorem is more flexible. – Bernard Dec 11 '14 at 01:07
  • @HarishKumar What I want is italics for remarks, and bold for everything else. But It has made everything into non-bold italics, not just remarks. – user112495 Dec 11 '14 at 01:09
  • @Bernard So what I want to try and get is to have unnumbered remarks with an italic heading, whilst keeping definitions, theorems lemmas etc. with bold headings. Is there no easy way to do this with amsthm? – user112495 Dec 11 '14 at 01:18
  • Simply use \theoremstyle{remark} and \newtheorem*{remark}{Remark} in your preamble. Put it after your other \newtheorems. – Bernard Dec 11 '14 at 01:41

1 Answers1

2

You should use them like this.

\documentclass{article}
\usepackage{amsmath,amsthm}

\newtheorem{theorem}{Theorem}[section]
\newtheorem{corollary}{Corollary}[section]
\newtheorem{proposition}{Proposition}[section]
\newtheorem{lemma}{Lemma}[section]
\newtheorem{example}{Example}[section]
\theoremstyle{definition}
\newtheorem{definition}{Definition}[section]
\theoremstyle{remark}
\newtheorem{remark}{Remark}[section]
\begin{document}
  \begin{definition}
    This is a definition
  \end{definition}
  \begin{theorem}
    This is a theorem
  \end{theorem}
  \begin{corollary}
    This is a corollary
  \end{corollary}
  \begin{proposition}
    This is a proposition
  \end{proposition}
  \begin{lemma}
    This is a lemma
  \end{lemma}
  \begin{example}
    This is an example
  \end{example}
  \begin{remark}
    This is a remark
  \end{remark}
\end{document}

enter image description here