Table of Contents, Theorems, AMSThm – Including AMS Theorems

amsthmtable of contentstheorems

I am using the amsthm package. I defined some enviroments like

\theoremstyle{plain}
\newtheorem{theo}[subsection]{Theorem}
\newtheorem{satz}[subsection]{Satz}

the numbering works as expected, counting the theorems as if they where subsections. However I also want them to appear in the table of contents as if they were subsections.

UPDATE

To be more precise, say I have the following document:

\begin{document}
\tableofcontents

\chapter{Chapter One}

\section{Section A}
\begin{theo}[First Theorem]
Whatever.
\end{theo}

\section{Section B}
\begin{theo}[Second Theorem]
Whatever.
\end{theo}

\chapter{Chapter Two}

\section{Section A} 
\begin{theo}[Third Theorem]
Whatever.
\end{theo}

\begin{theo}[Fourth Theorem]
Whatever.
\end{theo}
\end{document}

I want my table of contents to look like this

1. Chapter One
    1.1 Section A
        1.1.1 First Theorem
    1.2 Section B
        1.2.1 Second Theorem
2. Chapter Two
    2.1 Section A
        2.1.1 Third Theorem
        2.1.2 Fourth Theorem

Best Answer

You can incorporate the writing in the .toc file by defining an auxiliary environment; I use xparse because it makes easy to cope with the presence of an optional argument.

\documentclass{article}

\usepackage{amsthm,xparse}

\usepackage{lipsum}

\theoremstyle{plain}
\newtheorem{theoaux}[subsection]{Theorem}

\NewDocumentEnvironment{theo}{o}
 {\IfNoValueTF{#1}
   {\theoaux\addcontentsline{toc}{subsection}{\protect\numberline{\thesubsection}Theorem}}
   {\theoaux[#1]\addcontentsline{toc}{subsection}{\protect\numberline{\thesubsection}Theorem (#1)}}%
   \ignorespaces}
 {\endtheoaux}

\begin{document}

\tableofcontents

\section{A section}

\lipsum[1]

\subsection{A subsection}

\lipsum[2]

\subsection{A subsection}

\lipsum[3-4]

\begin{theo}\label{theo1}
$0=0$
\end{theo}

\section{Sec 2}

\lipsum[4]

\begin{theo}[B. C. Dull]\label{theo2}
$1>0$
\end{theo}

\end{document}
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