beamernumberingtheorems
I am trying to work on the numbering of the theorems/definitions/lemmas etc., and I have some problems with the numbering.
I would like the theorems, propositions, corollarys, definitions, examples in Beamer (a presentation) as follows:
1 Functions (SECTION)
1.1 Basics (SUBSECTION)
Definition 1.1.1.
Theorem 1.1.1.
Theorem 1.1.2.
Example 1.1.1.
1.2 Some result (SUBSECTION)
Definition 1.2.1.
Theorem 1.2.1.
Theorem 1.2.2.
Example 1.2.1.
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}
From your code, it seems that you want each of the theorem-like environments to inherit the subsection counter. As such, I have used
\newcounter{dummy}
\numberwithin{dummy}{subsection}
in the below.
Note that you can use
\newtheorem{example}[dummy]{Example}
which tells the newtheorem command to make the example counter inherit the dummy counter, but not
\newtheorem{example}{Example}[dummy][subsection]
as this is undefined.
Here's the complete MWE:
\documentclass{article}
\usepackage{amsmath,amssymb}
\usepackage[thmmarks]{ntheorem}
\newcounter{dummy}
\numberwithin{dummy}{subsection}
\theoremprework{\setlength
\theorempreskipamount{10 pt}\setlength\theorempostskipamount{10 pt}}
\theoremstyle{plain}
\theorembodyfont{\upshape}
\theoremsymbol{\ensuremath{\clubsuit}}
\theoremseparator{:}
\newtheorem{example}[dummy]{Example}
\theoremstyle{plain}
\theorembodyfont{\upshape}
\theoremsymbol{\ensuremath{\blacklozenge}}
\theoremseparator{:}
\newtheorem{remark}[dummy]{Remark}
\theoremprework{\setlength\theorempreskipamount{10 pt}}
\theoremstyle{plain}
\theorembodyfont{\slshape}
\theoremsymbol{}
\theoremseparator{:}
\newtheorem{theorem}[dummy]{Theorem}
\theoremstyle{plain}
\theorembodyfont{\slshape}
\theoremsymbol{}
\theoremseparator{:}
\newtheorem{prop}[dummy]{Proposition}
\theoremstyle{plain}
\theoremheaderfont{\upshape \bfseries}
\theorembodyfont{\slshape}
\theoremsymbol{}
\theoremseparator{:}
\newtheorem{corollary}[dummy]{Corollary}
\theoremstyle{plain}
\theoremheaderfont{\upshape \bfseries}
\theorembodyfont{\slshape}
\theoremsymbol{}
\theoremseparator{:}
\newtheorem{lemma}[dummy]{Lemma}
\begin{document}
\section{Section}
\subsection{SubSection}
\begin{theorem} Hey
\end{theorem}
\begin{lemma}I
\end{lemma}
\begin{prop}Just
\end{prop}
\begin{remark}Met
\end{remark}
\begin{example}You
\end{example}
\subsection{SubSection}
\begin{theorem} Hey
\end{theorem}
\begin{lemma}I
\end{lemma}
\begin{prop}Just
\end{prop}
\begin{remark}Met
\end{remark}
\begin{example}You
\end{example}
\end{document}
Best Answer
You need to number subsections within sections and theorems within sections, to achieve what you want.
Also, you need to declare
otherwise they are not numbered at all.
MWE:
Note that I haven't changed the fact that all theorem-like environments share the same counter.