numberingtheorems
I am using the article document class with amsthm. I would like number the theorems/corollaries/examples, etc., consecutively as follows:
1.1 Theorem
1.2 Example
1.3 Example
1.4 Proposition
However, what my LaTeX renders is
Theorem 1.1
Example 1.2
Example 1.3
Proposition 1.4
How do I get a numbering as in the first?
Similar to the solution at this question and section 3 of the amsthm documentation:
\documentclass[11pt,a4paper]{report}
\usepackage{amsthm}
\theoremstyle{plain}
\newtheorem{thm}{Theorem}[chapter] % reset theorem numbering for each chapter
\theoremstyle{definition}
\newtheorem{defn}[thm]{Definition} % definition numbers are dependent on theorem numbers
\newtheorem{exmp}[thm]{Example} % same for example numbers
\newcommand{\chaptercontent}{
\section{Basics}
\begin{defn}Here is a new definition.\end{defn}
\begin{thm}Here is a new theorem.\end{thm}
\begin{thm}Here is a new theorem.\end{thm}
\begin{exmp}Here is a good example.\end{exmp}
\subsection{Some tips}
\begin{defn}Here is a new definition.\end{defn}
\section{Advanced stuff}
\begin{defn}Here is a new definition.\end{defn}
\subsection{Warnings}
\begin{defn}Here is a new definition.\end{defn}
}
\begin{document}
\tableofcontents
\part{Addition and Subtraction}
\chapter{Addition} \chaptercontent
\chapter{Subtraction} \chaptercontent
\part{Multiplication and Division}
\chapter{Multiplication} \chaptercontent
\chapter{Division} \chaptercontent
\end{document}
You need to number subsections within sections and theorems within sections, to achieve what you want.
\numberwithin{subsection}{section}
\numberwithin{theorem}{subsection}
Also, you need to declare
\setbeamertemplate{theorems}[numbered]
otherwise they are not numbered at all.
MWE:
\documentclass{beamer}
\setbeamertemplate{theorems}[numbered]
\numberwithin{subsection}{section}
\numberwithin{theorem}{subsection}
\begin{document}
\section{Functions}
\subsection{Basics}
\begin{frame}
\frametitle{A Theorem on Infinite Sets}
\begin{theorem}
There exists an infinite set.
\end{theorem}
\begin{proof}
This follows from the axiom of infinity.
\end{proof}
\begin{example}[Natural Numbers]
The set of natural numbers is infinite.
\end{example}
\end{frame}
\end{document}
Note that I haven't changed the fact that all theorem-like environments share the same counter.
Best Answer
Use
just before declaring your theorem-like structures. A little example: