[Tex/LaTex] How to boldface only a subsection number in amsart

amsartboldsectioning

If I use the code

\makeatletter
\renewcommand{\@secnumfont}{\bfseries}
\makeatother

from How to boldface a section header? (including title and number) it makes the number of sections bold as well. How to get a boldface number only for subsection? Looking into amsart.cls, it seems like there is not a specific command for sub(sub)sections or paragraphs.

Best Answer

Tapping into \@seccntformat you can format the section counter display to suit your needs based on the type of counter that is being used.

Below I've added a conditional that checks whether you're setting the subsection counter. If so, use \bfseries. Of course, this can be expanded to change other sectional counter setting as well by adding more conditions:

enter image description here

\documentclass{amsart}

\makeatletter
\def\@seccntformat#1{%
  \protect\textup{\protect\@secnumfont
    \ifnum\pdfstrcmp{subsection}{#1}=0 \bfseries\fi% subsection # in \bfseries
    \csname the#1\endcsname
    \protect\@secnumpunct
  }%
}  
\makeatother

\begin{document}
\section{A section}
\subsection{A subsection}
\subsubsection{A subsection}
\end{document}

This requires e-TeX due to \pdfstrcmp.

Related Solutions

[Tex/LaTex] How to remove Section, SubSection titles

You can define a \fakesection that does all the things the regular \section does except print the actual heading:

\newcommand{\fakesection}[1]{%
  \par\refstepcounter{section}% Increase section counter
  \sectionmark{#1}% Add section mark (header)
  \addcontentsline{toc}{section}{\protect\numberline{\thesection}#1}% Add section to ToC
  % Add more content here, if needed.
}

A similar macro for \fakesubsection would be

\newcommand{\fakesubsection}[1]{%
  \par\refstepcounter{subsection}% Increase subsection counter
  \subsectionmark{#1}% Add subsection mark (header)
  \addcontentsline{toc}{subsection}{\protect\numberline{\thesubsection}#1}% Add subsection to ToC
  % Add more content here, if needed.
}

The uses would be \fakesection{some section} and \fakesubsection{some subsection}.

[Tex/LaTex] How to do this amsart Table of Contents excluding dots on bold section rows

The amsart document class has a very strict way in which it sets things up, specifically because it is meant for publication submissions. As such, there's not much in terms of user-interface variation available. This is a good thing. However, it requires a complete revamp of the ToC-generation and interaction in order for it to be flexible.

Here is something that seems to satisfy all your requirements without using any additional packages (except etoolbox):

enter image description here

\documentclass{amsart}
\usepackage[showframe,paper=a5paper]{geometry}% Just for this example
\usepackage{etoolbox}

% Modifications to amsart ToC-related macros...
\makeatletter
\let\old@tocline\@tocline
\let\section@tocline\@tocline
% Insert a dotted ToC-line for \subsection and \subsubsection only
\newcommand{\subsection@dotsep}{4.5}
\newcommand{\subsubsection@dotsep}{4.5}
\patchcmd{\@tocline}
  {\hfil}
  {\nobreak
     \leaders\hbox{$\m@th
        \mkern \subsection@dotsep mu\hbox{.}\mkern \subsection@dotsep mu$}\hfill
     \nobreak}{}{}
\let\subsection@tocline\@tocline
\let\@tocline\old@tocline

\patchcmd{\@tocline}
  {\hfil}
  {\nobreak
     \leaders\hbox{$\m@th
        \mkern \subsubsection@dotsep mu\hbox{.}\mkern \subsubsection@dotsep mu$}\hfill
     \nobreak}{}{}
\let\subsubsection@tocline\@tocline
\let\@tocline\old@tocline

\let\old@l@subsection\l@subsection
\let\old@l@subsubsection\l@subsubsection

\def\@tocwriteb#1#2#3{%
  \begingroup
    \@xp\def\csname #2@tocline\endcsname##1##2##3##4##5##6{%
      \ifnum##1>\c@tocdepth
      \else \sbox\z@{##5\let\indentlabel\@tochangmeasure##6}\fi}%
    \csname l@#2\endcsname{#1{\csname#2name\endcsname}{\@secnumber}{}}%
  \endgroup
  \addcontentsline{toc}{#2}%
    {\protect#1{\csname#2name\endcsname}{\@secnumber}{#3}}}%

% Handle section-specific indentation and number width of ToC-related entries
\newlength{\@tocsectionindent}
\newlength{\@tocsubsectionindent}
\newlength{\@tocsubsubsectionindent}
\newlength{\@tocsectionnumwidth}
\newlength{\@tocsubsectionnumwidth}
\newlength{\@tocsubsubsectionnumwidth}
\newcommand{\settocsectionnumwidth}[1]{\setlength{\@tocsectionnumwidth}{#1}}
\newcommand{\settocsubsectionnumwidth}[1]{\setlength{\@tocsubsectionnumwidth}{#1}}
\newcommand{\settocsubsubsectionnumwidth}[1]{\setlength{\@tocsubsubsectionnumwidth}{#1}}
\newcommand{\settocsectionindent}[1]{\setlength{\@tocsectionindent}{#1}}
\newcommand{\settocsubsectionindent}[1]{\setlength{\@tocsubsectionindent}{#1}}
\newcommand{\settocsubsubsectionindent}[1]{\setlength{\@tocsubsubsectionindent}{#1}}

% Handle section-specific formatting and vertical skip of ToC-related entries
% \@tocline{<level>}{<vspace>}{<indent>}{<numberwidth>}{<extra>}{<text>}{<pagenum>}
\renewcommand{\l@section}{\section@tocline{1}{\@tocsectionvskip}{\@tocsectionindent}{}{\@tocsectionformat}}%
\renewcommand{\l@subsection}{\subsection@tocline{2}{\@tocsubsectionvskip}{\@tocsubsectionindent}{}{\@tocsubsectionformat}}%
\renewcommand{\l@subsubsection}{\subsubsection@tocline{3}{\@tocsubsubsectionvskip}{\@tocsubsubsectionindent}{}{\@tocsubsubsectionformat}}%
\newcommand{\@tocsectionformat}{}
\newcommand{\@tocsubsectionformat}{}
\newcommand{\@tocsubsubsectionformat}{}
\expandafter\def\csname toc@1format\endcsname{\@tocsectionformat}
\expandafter\def\csname toc@2format\endcsname{\@tocsubsectionformat}
\expandafter\def\csname toc@3format\endcsname{\@tocsubsubsectionformat}
\newcommand{\settocsectionformat}[1]{\renewcommand{\@tocsectionformat}{#1}}
\newcommand{\settocsubsectionformat}[1]{\renewcommand{\@tocsubsectionformat}{#1}}
\newcommand{\settocsubsubsectionformat}[1]{\renewcommand{\@tocsubsubsectionformat}{#1}}
\newlength{\@tocsectionvskip}
\newcommand{\settocsectionvskip}[1]{\setlength{\@tocsectionvskip}{#1}}
\newlength{\@tocsubsectionvskip}
\newcommand{\settocsubsectionvskip}[1]{\setlength{\@tocsubsectionvskip}{#1}}
\newlength{\@tocsubsubsectionvskip}
\newcommand{\settocsubsubsectionvskip}[1]{\setlength{\@tocsubsubsectionvskip}{#1}}

% Adjust section-specific ToC-related macros to have a fixed-width numbering framework
\patchcmd{\tocsection}{\indentlabel}{\makebox[\@tocsectionnumwidth][l]}{}{}
\patchcmd{\tocsubsection}{\indentlabel}{\makebox[\@tocsubsectionnumwidth][l]}{}{}
\patchcmd{\tocsubsubsection}{\indentlabel}{\makebox[\@tocsubsubsectionnumwidth][l]}{}{}

% Allow for section-specific page numbering format of ToC-related entries
\newcommand{\@sectypepnumformat}{}
\renewcommand{\contentsline}[1]{%
  \expandafter\let\expandafter\@sectypepnumformat\csname @toc#1pnumformat\endcsname%
  \csname l@#1\endcsname}
\newcommand{\@tocsectionpnumformat}{}
\newcommand{\@tocsubsectionpnumformat}{}
\newcommand{\@tocsubsubsectionpnumformat}{}
\newcommand{\setsectionpnumformat}[1]{\renewcommand{\@tocsectionpnumformat}{#1}}
\newcommand{\setsubsectionpnumformat}[1]{\renewcommand{\@tocsubsectionpnumformat}{#1}}
\newcommand{\setsubsubsectionpnumformat}[1]{\renewcommand{\@tocsubsubsectionpnumformat}{#1}}
\renewcommand{\@tocpagenum}[1]{%
  \hfill {\mdseries\@sectypepnumformat #1}}

% Small correction to Appendix, since it's still a \section which should be handled differently
\let\oldappendix\appendix
\renewcommand{\appendix}{%
  \leavevmode\oldappendix%
  \addtocontents{toc}{%
    \protect\settowidth{\protect\@tocsectionnumwidth}{\protect\@tocsectionformat\sectionname\space}%
    \protect\addtolength{\protect\@tocsectionnumwidth}{2em}}%
}
\makeatother

% #1 (default is as required)

% #2

% #3
\makeatletter
\settocsectionnumwidth{2em}
\settocsubsectionnumwidth{2.5em}
\settocsubsubsectionnumwidth{3em}
\settocsectionindent{1pc}%
\settocsubsectionindent{\dimexpr\@tocsectionindent+\@tocsectionnumwidth}%
\settocsubsubsectionindent{\dimexpr\@tocsubsectionindent+\@tocsubsectionnumwidth}%
\makeatother

% #4 & #5
\settocsectionvskip{10pt}
\settocsubsectionvskip{0pt}
\settocsubsubsectionvskip{0pt}
    
% #6 & #7
% See #3

% #8
\renewcommand{\contentsnamefont}{\bfseries\Large}

% #9
\settocsectionformat{\bfseries}
\settocsubsectionformat{\mdseries}
\settocsubsubsectionformat{\mdseries}
\setsectionpnumformat{\bfseries}
\setsubsectionpnumformat{\mdseries}
\setsubsubsectionpnumformat{\mdseries}

% #10
% Insert the following command inside your text where you want the ToC to have a page break
\newcommand{\tocpagebreak}{\leavevmode\addtocontents{toc}{\protect\clearpage}}

% #11
\let\oldtableofcontents\tableofcontents
\renewcommand{\tableofcontents}{%
  \vspace*{-\linespacing}% Default gap to top of CONTENTS is \linespacing.
  \oldtableofcontents}

\setcounter{tocdepth}{3}
\begin{document}

\tableofcontents
\section{First section}
\subsection{First subsection}
\subsection{Second subsection}
\subsubsection{First subsubsection}
\subsubsection{Second subsubsection}
\section{Second section}
\subsection{First subsection}
\tocpagebreak
\subsection{Second subsection}
\subsubsection{First subsubsection}
\subsubsection{Second subsubsection}

\appendix
\section{An appendix section}
\subsection{First appendix subsection}
\subsection{Second appendix subsection}
\subsubsection{First appendix subsubsection}
\subsubsection{Second appendix subsubsection}
\end{document}

Specific to the requirements:

This is the default setting under amsart, so there's nothing to be done in this regard.
Only the \subsection and \subsubsection ToC entries have been adjusted to include a dotted line. This was taken from latex.ltx's \@dottedtocline that uses leaders.

Adjustments to the spacing between the dots can be achieved using (for example)

    \makeatletter
    \renewcommand{\subsection@dotsep}{5}% Adjust subsection dot gap
    \renewcommand{\subsubsection@dotsep}{5}% Adjust subsubsection dot gap
    \makeatother

The default values for both are 4.5.

The indentation can be set for each of the section levels \section, \subsection and \subsubsection, in addition to the width of the numbers in the ToC. The following self-explanatory macros set the defaults:

 \makeatletter
 \settocsectionnumwidth{2em}
 \settocsubsectionnumwidth{2.5em}
 \settocsubsubsectionnumwidth{3em}
 \settocsectionindent{1pc}%
 \settocsubsectionindent{\dimexpr\@tocsectionindent+\@tocsectionnumwidth}%
 \settocsubsubsectionindent{\dimexpr\@tocsubsectionindent+\@tocsubsectionnumwidth}%
 \makeatother

The subsection and subsubsection indents are set relative to the sections and subsections, making them line up within the ToC as required.

The default \@tocline macro of amsart provides a vertical skip before every sectional unit. This has been customized and can be set with a number of user-interface macros. The defaults are:
```
 \settocsectionvskip{10pt}
 \settocsubsectionvskip{0pt}
 \settocsubsubsectionvskip{0pt}
```

This leaves a gap of at least 10pt above a \section heading, but no gap (0pt) above a subsection or subsubsection.

See (4) above.
This can be adjusted using the number widths as refined in (3) above.
See (6).
\contentsnamefont holds the formatting of the ToC heading. A simple \renewcommand suffices to changes this. For example,
```
 \renewcommand{\contentsnamefont}{\bfseries\Large}
```

Each sectional heading in the ToC can be formatted at the "number+title" and "page number" level via the following self-explanatory macros:

 \settocsectionformat{\bfseries}
 \settocsubsectionformat{\mdseries}
 \settocsubsubsectionformat{\mdseries}
 \setsectionpnumformat{\bfseries}
 \setsubsectionpnumformat{\mdseries}
 \setsubsubsectionpnumformat{\mdseries}

(Optional) Insert \tocpagebreak within your document at the appropriate place between sectional units where you want the equivalent location to be broken in the ToC.
(Optional) \tableofcontents can be adjusted to insert a negative \vspace where appropriate.

This adaptation is not compatible with hyperref, unfortunately. If that is required, one may be better off by recreating the ToC and sectional unit layout using packages that support this in a more consistent/uniform way, and using a different class like article.

Best Answer

Related Solutions

[Tex/LaTex] How to remove Section, SubSection titles

[Tex/LaTex] How to do this amsart Table of Contents excluding dots on bold section rows

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