[Tex/LaTex] theorem numbering: section counter but remove the section number

numberingsectioningtheorems

I'm searching how to remove the chapter+section number on the theorem numbering with a section counter.

With no section counter it's like:

\newtheorem{thm}{Title}
Chapter1
----Section 1
--------thm 1
--------thm 2
----Section 2
--------thm 3
--------thm 4
Chapter2
----Section 1
--------thm 5
--------thm 6
----Section 2
--------thm 7
--------thm 8

And with the section counter:

\newtheorem{thm}{Title}[section]
Chapter 1
----Section 1
--------thm 1.1.1
--------thm 1.1.2
----Section 2
--------thm 1.2.1
--------thm 1.2.2
Chapter 2
----Section 1
--------thm 2.1.1
--------thm 2.1.2
----Section 2
--------thm 2.2.1
--------thm 2.2.2

And I want numbering my theorems like this:

\newtheorem????????
Chapter 1
----Section 1
--------thm 1
--------thm 2
----Section 2
--------thm 1
--------thm 2
Chapter 2
----Section 1
--------thm 1
--------thm 2
----Section 2
--------thm 1
--------thm 2

I know it's always a pain to remove such things, thanks for whoever will help me ^^

Best Answer

Just re-define \renewcommand{\thethm}{\arabic{thm}}

\documentclass[10pt,a4paper]{report}
\usepackage{amsthm}
\newtheorem{thm}{Title}[section]
\renewcommand{\thethm}{\arabic{thm}}
\begin{document}
  \chapter{one}
  \section{some}
  \begin{thm}
    Some theorem
  \end{thm}
  \begin{thm}
    Some theorem
  \end{thm}
  \section{some}
  \begin{thm}
    Some theorem
  \end{thm}
  \begin{thm}
    Some theorem
  \end{thm}
  \chapter{two}
  \section{some}
  \begin{thm}
    Some theorem
  \end{thm}
  \begin{thm}
    Some theorem
  \end{thm}
\end{document}

Related Solutions

[Tex/LaTex] Theorem/Definition/Lemma problem — Numbering

Similar to the solution at this question and section 3 of the amsthm documentation:

enter image description here

\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}

[Tex/LaTex] Common numbering with ntheorem

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.

screenshot

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

Related Solutions

[Tex/LaTex] Theorem/Definition/Lemma problem — Numbering

[Tex/LaTex] Common numbering with ntheorem

Related Question