Text Formatting ⇒ Section numbering for amsthm theorem numbering

[rschley]

I am writing chapters as individual LaTeX documents. For example, Chapter 8 is its own file. Within each chapter, I want to number the theorems [chapter number.theorem number] (e.g., 8.1, 8.2, etc.). Because each chapter is its own file, I am unable to use sections to create decimal forms of theorem numbers using amsthm.

In the code below, my goal is to have Theorem 8.1, not 1.8. I've been searching and trying different things, but haven't had any luck on my own. Any help is greatly appreciated.

Code: Select all

\documentclass{article}
\usepackage{xcolor}
\usepackage{amsthm}
\usepackage{framed}
\colorlet{shadecolor}{gray!50}
\newtheorem{theorem}{Theorem}[section]
\newenvironment{theo}
  {\begin{shaded}\begin{theorem}}
  {\end{theorem}\end{shaded}}

\begin{document}

\section{Section 8}

\setcounter{theorem}{7}

\begin{theo}
Some important theorem.
\end{theo}

\end{document}

[Johannes_B]

I think i am not quite getting what you want to achieve, because at the moment the solution seems more than obvious to me.

Code: Select all

\documentclass{article}
\usepackage{xcolor}
\usepackage{amsthm}
\usepackage{framed}
\colorlet{shadecolor}{gray!50}
\newtheorem{theorem}{Theorem}[section]
\newenvironment{theo}
  {\begin{shaded}\begin{theorem}}
  {\end{theorem}\end{shaded}}

\begin{document}
\setcounter{section}{7}
\section{Section 8}
%\setcounter{theorem}{7}
\begin{theo}
Some important theorem.
\end{theo}

\end{document}

It seems to me, that report (or even better scrreprt) might be a better documentclass for you. Maybe even book (scrbook). You can still input (or \include) all the different chapters on their own.

[rschley]

Thank you, Johannes_B. As you suggested, once I calmed down the answer was simple and obvious. The code below inserts a page of dummy sections, but the theorem on the second page begins numbering at 8.1, which is what I wanted. The number of dummy sections forces the incrementation of the leftmost digit.

I know I'm not explaining myself very well, but hopefully the code below showing my result helps clarify what I was asking for in my initial post.

Code: Select all

\documentclass{article}
\usepackage{xcolor}
\usepackage{amsthm}
\usepackage{framed}
\colorlet{shadecolor}{gray!50}
\newtheorem{theorem}{Theorem}[section]
\newenvironment{theo}
  {\begin{shaded}\begin{theorem}}
  {\end{theorem}\end{shaded}}

\begin{document}
\section{ }\section{ }\section{}\section{}\section{ }\section{ }\section{}\section{}
\newpage

\begin{theo}
Some important theorem.
\end{theo}

\end{document}

[Johannes_B]

Is your question answered now?

[rschley]

Yes, my question is answered.