amsthmnumberingtheorems
It seems \renewcommand{\theexample}{\Alph{example}} makes the section numbering disappear. Is there a way to avoid this?
\documentclass{article}
\usepackage{amsthm}
\theoremstyle{definition}
\newtheorem{example}{Example}[section]
\renewcommand*{\theexample}{\Alph{example}}
\begin{document}
\section{Intro}
\begin{example}[special curve]
Let something be something.
\end{example}
\section{Outro}
\begin{example}[special manifold]
Let something be something.
\end{example}
\end{document}
You could redefine the presentation of the theorem counter. For example:
\documentclass{article}
\newtheorem{theorem}{Theorem}
\renewcommand*{\thetheorem}{\Alph{theorem}}
\begin{document}
\begin{theorem}
Text
\end{theorem}
\end{document}
Output:
If your counter has the name theorem, the corresponding output command has the name \thetheorem. The command \Alph takes a counter as argument and returns the value converted into the corresponding capital letter. \alph would return lowercase letters instead.
As tohecz mentions in his comment, the difference in the styles that you mention is the one of the amsthm package: however, the amsbook class internally defines the remark and definition styles in a different way. Here are the definitions:
\def\th@definition{%
\let\thm@indent\indent
\thm@headfont{\scshape}% heading font small caps
\let\thmhead\thmhead@plain \let\swappedhead\swappedhead@plain
\thm@preskip.5\baselineskip\@plus.2\baselineskip
\@minus.2\baselineskip
\thm@postskip\thm@preskip
\upshape
}
\def\th@remark{%
\let\thm@indent\indent
\thm@headfont{\scshape}% heading font small caps
\let\thmhead\thmhead@plain \let\swappedhead\swappedhead@plain
\thm@preskip.5\baselineskip\@plus.2\baselineskip
\@minus.2\baselineskip
\thm@postskip\thm@preskip
\upshape
}
As you can see, both styles behave exactly the same when using amsbook.cls.
Best Answer
When you do
then
\theexampleis defined byand the
examplecounter is reset any timesectionis stepped.So you want to redefine
\theexampleby