[Tex/LaTex] Number subsections and subsubsections, but not sections

numberingsectioning

I'm working on an article and I don't want to number my sections. However, I do want my subsections and subsubsections to be numbered.
Right now my document has this numbering, but the 0 in 0.X.Y should not be there. How can I fix that?

Currently:
Section
0.1 subsection
0.2 subsection
0.2.1 subsubsection
0.3 subsection

Should be:
Section
1. subsection
2. subsection
2.1 subsubsection
3. subsection

This is my code:

\documentclass{article}

\begin{document}

\section*{Section}

\subsection{subsection}

\subsection{subsection}

\subsubsection{subsubsection}
blah
\subsection{subsection}

\end{document}

PS: I did search a on the web and found a lot on this topic, but not a solution to this particular thing.

Best Answer

If you're interested in printing \section{<heading>} in a similar way that \section*{<heading>} would print (that is, flush left and not indented), then titlesec provides an easy interface:

enter image description here

\documentclass{article}
\usepackage{titlesec}% http://ctan.org/pkg/titlesec
\titleformat{\section}%
  [hang]% <shape>
  {\normalfont\bfseries\Large}% <format>
  {}% <label>
  {0pt}% <sep>
  {}% <before code>
\renewcommand{\thesection}{}% Remove section references...
\renewcommand{\thesubsection}{\arabic{subsection}}%... from subsections
\begin{document}

\section{First section}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam sollicitudin rutrum tellus, 
eu luctus dolor commodo eu. Integer pellentesque mollis congue.

\subsection{First subsection}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam sollicitudin rutrum tellus, 
eu luctus dolor commodo eu. Integer pellentesque mollis congue.

\subsection{Second subsection}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam sollicitudin rutrum tellus, 
eu luctus dolor commodo eu. Integer pellentesque mollis congue.

\subsubsection{First subsubsection}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam sollicitudin rutrum tellus, 
eu luctus dolor commodo eu. Integer pellentesque mollis congue.

\subsection{Last subsection}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam sollicitudin rutrum tellus, 
eu luctus dolor commodo eu. Integer pellentesque mollis congue.

\section{Second section}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam sollicitudin rutrum tellus, 
eu luctus dolor commodo eu. Integer pellentesque mollis congue.

\subsection{First subsection}
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam sollicitudin rutrum tellus, 
eu luctus dolor commodo eu. Integer pellentesque mollis congue.

\end{document}

This just sets the label separator between the section number and title to 0pt, as well as not printing the number. \normalfont\bfseries\Large is the default formatting for article.

Related Solutions

[Tex/LaTex] Show/hide the sections, subsections and subsections that I want from the navigation sidebar (beamer, Berkeley)

Use the optional argument of the sectioning commands and leave it empty to not include the unit in the sidebar; the unit will, however, be included in the ToC; an example:

\documentclass{beamer}
\usetheme{Berkeley}

\begin{document}

\begin{frame}
\tableofcontents
\end{frame}

\section{Test Section One}
\begin{frame}test\end{frame}
\subsection[]{Test Subsection One One}
\begin{frame}test\end{frame}
\subsection{Test Subsection One Two}
\begin{frame}test\end{frame}

\section[]{Test Section Two}
\begin{frame}test\end{frame}

\section{Test Section Three}
\begin{frame}test\end{frame}
\subsection[]{Test Subsection Three One}
\begin{frame}test\end{frame}

\end{document}

The ToC:

enter image description here

and one of the frames with hidden units in the sidebar:

enter image description here

[Tex/LaTex] Numbering theorems as subsubsections

Use the first optional argument for \newtheorem:

\documentclass{book}
\usepackage{amsthm}

\newtheorem{theo}[subsubsection]{Theorem}
\newtheorem{defi}[subsubsection]{Definition}
\setcounter{secnumdepth}{3}

\begin{document}

\chapter{Test Chapter}
\section{Test Section}
\subsection{Test Subsection}
\subsubsection{Test Subsubsection}
\begin{theo}
test.
\end{theo}
\subsubsection{Test Subsubsection}
\begin{theo}
test.
\end{theo}
\begin{defi}
test.
\end{defi}
\subsubsection{Test Subsubsection}

\end{document}

enter image description here

I think this numbering schema can result hard to follow for readers (among other things, what if, for example, there's a theorem or a definition before a subsubsection is created?).

For the bonus point (and to make things even harder for the reader):

\documentclass{book}
\usepackage{amsthm}
\usepackage{amsmath}
\usepackage{etoolbox}
\numberwithin{equation}{subsection}

\newtheorem{theo}[subsubsection]{Theorem}
\newtheorem{defi}[subsubsection]{Definition}
\setcounter{secnumdepth}{3}

\AtBeginEnvironment{equation}{\setcounter{equation}{\value{subsubsection}}}{}{}{}
\AtEndEnvironment{equation}{\stepcounter{subsubsection}}{}{}{}

\begin{document}

\chapter{Test Chapter}
\section{Test Section}
\subsection{Test Subsection}
\subsubsection{Test Subsubsection}
\begin{theo}
test.
\end{theo}
\subsubsection{Test Subsubsection}
\begin{theo}
test.
\end{theo}
\begin{defi}
test.
\end{defi}
\begin{equation}
a=b.
\end{equation}
\subsubsection{Test Subsubsection}
\begin{equation}
c=d.
\end{equation}

\end{document}

enter image description here

I would rather use a simpler numbering schema:

\documentclass{book}
\usepackage{amsthm}
\usepackage{amsmath}

\newtheorem{theo}{Theorem}[chapter]
\newtheorem{defi}[theo]{Definition}
\newtheorem{prop}[theo]{Proposition}
\setcounter{secnumdepth}{3}

\begin{document}
...
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] Show/hide the sections, subsections and subsections that I want from the navigation sidebar (beamer, Berkeley)

[Tex/LaTex] Numbering theorems as subsubsections

Related Question