The HOL tutorial.
1 % extra.sty : Isabelle Manual extra macros for non-Springer version
3 \typeout{Document Style extra. Released 17 February 1994}
5 %%Euro-style date: 20 September 1955
6 \def\today{\number\day\space\ifcase\month\or
7 January\or February\or March\or April\or May\or June\or
8 July\or August\or September\or October\or November\or December\fi
11 %%Borrowed from alltt.sty, but leaves % as the comment character
12 \def\docspecials{\do\ \do\$\do\&%
13 \do\#\do\^\do\^^K\do\_\do\^^A\do\~}
15 %%%Put first chapter on odd page, with arabic numbering; like \cleardoublepage
16 \newcommand\clearfirst{\clearpage\ifodd\c@page\else
17 \hbox{}\newpage\if@twocolumn\hbox{}\newpage\fi\fi
18 \pagenumbering{arabic}}
20 %%%Ruled chapter headings
21 \def\@rulehead#1{\hrule height1pt \vskip 14pt \Huge \bf
22 #1 \vskip 14pt\hrule height1pt}
23 \def\@makechapterhead#1{ { \parindent 0pt
24 \ifnum\c@secnumdepth >\m@ne \raggedleft\large\bf\@chapapp{} \thechapter \par
25 \vskip 20pt \fi \raggedright \@rulehead{#1} \par \nobreak \vskip 40pt } }
27 \def\@makeschapterhead#1{ { \parindent 0pt \raggedright
28 \@rulehead{#1} \par \nobreak \vskip 40pt } }