Text Formatting ⇒ amsthm | Theorem Counter Problem with Subsection

[bkarpuz]

Dear LC members,

See my problem below.
I guess the last theorem should have the label Theorem 2.0.1 but it is not. How can I fix it?

Code: Select all

\documentclass[12pt]{article}
\usepackage{amsthm}

\theoremstyle{definition}
\newtheorem{theorem}{Theorem}[subsection]

\begin{document}
\section{Section}
\subsection{Subsection}
\begin{theorem}
--
\end{theorem}
\begin{theorem}
--
\end{theorem}
\subsection{Subsection}
\begin{theorem}
--
\end{theorem}
\begin{theorem}
--
\end{theorem}
\begin{theorem}
--
\end{theorem}
\begin{theorem}
--
\end{theorem}
\section{Section}
\begin{theorem}
{\Large Why not 2.0.1?}
\end{theorem}
\end{document}

I also have another question.
Is it possible to enumerate theorems as Theorem 1.1.1, Theorem 1.1.2 and so on in subsubsections but as Theorem 2.1 in section?


Thank you.
bkarpuz

[justdeath]

Because you have to reset the counter: \setcounter{theorem}{0}.

Code: Select all

\documentclass[12pt]{article}
\usepackage{amsthm}

\theoremstyle{definition}
\newtheorem{theorem}{Theorem}[subsection]

\begin{document}
\section{Section}
\subsection{Subsection}
\begin{theorem}
--
\end{theorem}
\section{Section}
\setcounter{theorem}{0}
\begin{theorem}
{\Large Why not 2.0.1?}
\end{theorem}

\end{document}

Nikolay

[bkarpuz]

Because you have to reset the counter: \setcounter{theorem}{0}.

Code: Select all

\documentclass[12pt]{article}
\usepackage{amsthm}

\theoremstyle{definition}
\newtheorem{theorem}{Theorem}[subsection]

\begin{document}
\section{Section}
\subsection{Subsection}
\begin{theorem}
--
\end{theorem}
\section{Section}
\setcounter{theorem}{0}
\begin{theorem}
{\Large Why not 2.0.1?}
\end{theorem}

\end{document}

Nikolay

Thank you Nikolay for your answer.

I know it works when I reset it manually but it seems to be a problem of the package. I was asking for a general solution, which could be introduced in the preambles.

Thank you.
bkarpuz

[justdeath]

Nope, not possible. Because the counter depends on subsections, meaining sections have no effect on it.

You can use this:

Code: Select all

\newtheorem{theorem}{Theorem}[section]

but it will not honour subsections.

Nikolay