% \def\filename{amsdtx.dtx}
% \def\fileversion{2.07}
% \def\filedate{2009/08/19}
%
% \iffalse meta-comment
%
% American Mathematical Society
% Technical Support
% Publications Technical Group
% 201 Charles Street
% Providence, RI 02904
% USA
% tel: (401) 455-4080
% (800) 321-4267 (USA and Canada only)
% fax: (401) 331-3842
% email: tech-support@ams.org
%
% Copyright 1996, 1999, 2004, 2009 American Mathematical Society.
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
% This work has the LPPL maintenance status `maintained'.
%
% The Current Maintainer of this work is the American Mathematical
% Society.
%
% \fi
%
% \iffalse
% The following section of code makes this file self-printable.
%<*driver>
\NeedsTeXFormat{LaTeX2e}
\documentclass{amsdtx}
\newcommand{\rp}{\let\PBS\\\raggedright\let\\\PBS}
\CodelineIndex
\begin{document}
\title{The \cls{amsldoc} and \cls{amsdtx} document classes}
\author{American Mathematical Society\\Michael Downes\\
updated by David M. Jones}
\date{Version \fileversion, \filedate}
\DocInput{amsdtx.dtx}
\PrintIndex
\end{document}
%
% \fi
%
%^^A If this file is printed by itself the \fileversion and \filedate
%^^A information will come from the file header rather than from the
%^^A \ProvidesClass command. See \hDocInput.
% \maketitle
%
% \tableofcontents
%
% \MakeShortVerb\|
% \section{Introduction}
% This file is the source for two documentclasses, \cls{amsldoc}
% (used for the \amslatex/ user's guide) and \cls{amsdtx} (used for
% printing AMS \fn{.dtx} files). The generic \cls{book} class is used
% as a base, but the \cls{amsdtx} class is modified to serve as an
% article-type class. This affects the form of documentation files
% mainly in the use of \cn{maketitle} and \cn{chapter}.
%
% \begin{table}
% \caption{Features of the \cls{amsldoc} and \cls{amsdtx} classes}
% \centering
% \begin{tabular}{lp{.65\columnwidth}}
% Command Name& Purpose\\
% \hline
% \cn{cn}& \rp To print a user command name: \verb"\cn{title}"; leading
% backslash can be optionally included for control symbols:
% \verb"\cn{\%}". The \cn{cn} command works properly even in macro
% arguments (compare to, e.g., \cn{verb}\verb"'\newif'"). But beware
% of a fragile control symbol (are there any?) in a moving argument.\\
% \cn{cs}& \rp `Control sequence': to print an internal command name,
% not intended for the end user\\
% \cn{env}& \rp To print an environment name: \verb"\env{table}"\\
% \cn{pkg}& \rp To print a package name: \verb"\pkg{eufrak}"\\
% \cn{cls}& \rp To print a class name: \verb"\cls{book}"\\
% \cn{opt}& \rp To print the name of a class or package option:
% \verb"\opt{twocolumn}"\\
% \cn{bst}& \rp To print the name of a \bibtex/ style
% \verb"\bst{amsalpha}"\\
% \cn{fn}& \rp To print a file name or font name: \verb"\fn{T1enc.def}",
% \verb"\fn{cmsy10}"\\
% \cn{fnt}& \rp To print a font name: \verb"\fn{cmsy10}" \\
% \cn{cnt}& \rp To print a counter name: \verb"\fn{topnumber}" \\
% \cn{qc}& \rp To quote a single character: \verb"\qc{\%}";
% this works properly for special characters, even in macro
% arguments, unlike e.g., \verb"\verb'%'"\\
% \cn{latex/} etc.& \rp Convenient forms of \cn{LaTeX}, \cn{TeX},
% \cn{BibTeX}, etc. that are easier to type and have a trailing slash
% to eliminate the following-space problem (without needing different
% markup in different contexts)
% \end{tabular}
% \end{table}
%
% \StopEventually{}
%
% Standard starting pieces. (Note: the reason each \cn{ProvidesClass}
% command is placed on a line by itself, with separate begin and end
% guards for docstripping, is to make automatic update of file date
% and version slightly easier and more robust.)
% \begin{macrocode}
\NeedsTeXFormat{LaTeX2e}% LaTeX 2.09 can't be used (nor non-LaTeX)
[1995/06/01]% LaTeX date must be June 1995 or later
%<*amsldoc>
\ProvidesClass{amsldoc}[2009/08/19 v2.07]
%
%<*amsdtx>
\ProvidesClass{amsdtx}[2009/08/19 v2.07]
%
% \end{macrocode}
%
% \section{Implementation}
% Start with the generic book class as a base.
% \begin{macrocode}
\DeclareOption*{\PassOptionsToClass{\CurrentOption}{book}}
\ProcessOptions
\LoadClass{book}
% \end{macrocode}
%
% \begin{macrocode}
\IfFileExists{url.sty}{%
\RequirePackage{url}\relax
\@gobble
}{%
\@firstofone
}
{
\DeclareRobustCommand{\url}[1]{%
\def\@tempa{#1}%
\texttt{\urlsetup $\expandafter\strip@prefix\meaning\@tempa$}%
}%
\def\urlsetup{%
\check@mathfonts \textfont\@ne\the\font \textfont\z@\the\font
\urlfix +\urlfix\=\urlfix\:\urlfix\-\urlfix\.\urlfix\,\urlfix\;%
\urlbreak\&\urlbreak\/\urlbreak\?%
}%
\def\urlbreak#1{%
\mathcode`#1="8000
\begingroup \lccode`\~=`#1 \lowercase{\endgroup \edef~}%
{\mathchar\number`#1\penalty\hyphenpenalty}%
}%
\def\urlfix#1{%
\mathcode`#1=`#1\relax
}%
}
% \end{macrocode}
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% \begin{macrocode}
\providecommand{\qq}[1]{\textquotedblleft#1\/\textquotedblright}
\providecommand{\mdash}{\textemdash\penalty\exhyphenpenalty}
\providecommand{\ndash}{\textendash\penalty\exhyphenpenalty}
% \end{macrocode}
%
% \begin{macrocode}
\let\@xp\expandafter
% \end{macrocode}
% \section{Indexing primitives}
%
% Unlike \pkg{amsdtx}, \pkg{amsldoc} doesn't load the \pkg{doc}
% package, so we need to provide the following logical names. The
% values are consistent with \fn{makeindex}'s default conventions.
% \begin{macrocode}
%<*amsldoc>
\def\actualchar{@}
\def\quotechar{"}
\def\levelchar{!}
\def\encapchar{|}
\def\verbatimchar{+}
% \end{macrocode}
% We also need the \cs{ifcodeline@index} switch.
% \begin{macrocode}
\newif\ifcodeline@index
%
% \end{macrocode}
%
% \begin{macro}{\autoindex}
% When generating a codeline index, this encapsulates the page
% number in italics.
% \begin{macrocode}
\newcommand*{\autoindex}[1]{%
\index{#1\ifcodeline@index\encapchar usage\fi}%
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\ntt}
% To avoid font substitution warnings we make the tt font always
% print in the normal weight and shape.
% \begin{macrocode}
\newcommand{\ntt}{\normalfont\ttfamily}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\indexcs}
% Index a control sequence without printing it. Note
% non-long. The \cs{@nobslash} strips off an optional leading
% backslash before passing the control sequence name to
% \cs{@indexcs}. This means that |\indexcs{\cs}| and
% |\indexcs{cs}| produce the same index entry.
% \begin{macrocode}
\newcommand*{\indexcs}[1]{%
\@xp\@xp\@xp\@indexcs\@xp\@nobslash\string#1\@nil
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@indexcs}
% Given |cs| as an argument, this writes something like
% |cs@\verb"*+\cs+| to the \fn{.idx} file (or |cs=\verb!*+\cs+| if
% using \fn{doc.sty}).
% \begin{macrocode}
\def\@indexcs#1\@nil{%
\autoindex{#1\actualchar
\string\verb\quotechar*\verbatimchar
\@xp\@bothoftwo\string\ #1\@empty
\verbatimchar
}%
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@bothoftwo}
% This has the effect of removing spaces before each of the
% arguments. In particular, it removes the space generated by
% \verb*+\string\ + above.
% \begin{macrocode}
\def\@bothoftwo#1#2{#1#2}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\category@index}
% \begin{macrocode}
\def\category@index#1#2{%
{\ntt#2}%
\@category@index{#1}{#2}%
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@category@index}
% \begin{macrocode}
\def\@category@index#1#2{%
\autoindex{%
#2\actualchar\string\texttt{#2}%
\ifx\@nil#1\@nil\else\space#1\fi
}%
}
% \end{macrocode}
% \end{macro}
%
% Some functions to support \cn{cn} etc. For most of these commands
% we don't really want them to be \cs{long}! But in some early
% releases of \LaTeXe\ the \verb'*' form of \cn{newcommand} was not
% yet available.
%
% We use the name \cn{bslchar} instead of \cn{bslash} to avoid
% potential conflict with the \pkg{doc} package \cn{bslash} command.
% Unlike \cn{bslash}, \cn{bslchar} survives unlimited
% writing/expansion because it is a chardef.
% \begin{macrocode}
\chardef\bslchar=`\\ % p. 424, TeXbook
\newcommand{\addbslash}{\expandafter\@addbslash\string}
\def\@addbslash#1{\bslchar\@nobslash#1}
\newcommand{\nobslash}{\expandafter\@nobslash\string}
\def\@nobslash#1{\ifnum`#1=\bslchar\else#1\fi}
% \end{macrocode}
%
% \begin{macro}{\@boxorbreak}
% Start up for a \cn{cs} or \cn{cn} command, adds an \cs{hbox} if in
% math, or an allowbreak penalty if the preceding item is not a space.
% (In case two such commands are used side-by-side.)
% \begin{macrocode}
\def\@boxorbreak{%
\leavevmode
\ifmmode\hbox\else\ifdim\lastskip=\z@\penalty9999 \fi\fi
}
% \end{macrocode}
% \end{macro}
%
% Control sequence. The function \cn{addbslash} makes this command
% also usable for some special control sequences like \cn{\%} \cn{\}}
% \cn{\{}: instead of writing |\cs{%}| which doesn't work, you can
% write |\cs{\%}|.
% \begin{macrocode}
\DeclareRobustCommand{\cs}[1]{%
\@boxorbreak{%
\ntt
\addbslash#1\@empty
\@xp\@xp\@xp\@indexcs\@xp\@nobslash\string#1\@nil
}%
}
% \end{macrocode}
%
% Allow distinguishing non-private `command names' that will be
% visible to the user from internal (mostly private) `control
% sequences'.
% \begin{macrocode}
\let\cn\cs
% \end{macrocode}
%
% \begin{macro}{\embrace}
% \begin{macrocode}
\DeclareTextSymbol{\lbracechar}{OT1}{123}
\DeclareTextSymbolDefault{\lbracechar}{OT1}
\DeclareTextSymbol{\rbracechar}{OT1}{125}
\DeclareTextSymbolDefault{\rbracechar}{OT1}
\providecommand{\embrace}[1]{%
\begingroup \ntt\lbracechar#1\rbracechar\endgroup}
% \end{macrocode}
% \end{macro}
%
% One mandatory argument: cnm; two: cnmm; one optional and one
% mandatory: cnom; throwing in a star: cnsom; and so on.
% \begin{macrocode}
\providecommand{\cnbreak}{\penalty999\hskip0pt\relax}
\providecommand{\cnm}[2]{\cn{#1}\cnbreak\embrace{#2}}
\providecommand{\cnmm}[3]{\cn{#1}\cnbreak\embrace{#2}\cnbreak\embrace{#3}}
\providecommand{\cnom}[1]{\cn{#1}\cnbreak\ommitude}
\providecommand{\ommitude}[2][]{{\ntt[#1]}\cnbreak\embrace{#2}}
\providecommand{\cnmsm}[4]{%
\cn{#1}\cnbreak\embrace{#2}\cnbreak *\embrace{#4}}
% \end{macrocode}
% The following items should not normally appear in math mode so they
% don't need to call \cs{@boxorbreak}.
%
% \latex/ documentclass name.
% \begin{macrocode}
\DeclareRobustCommand{\cls}{\category@index{class}}
% \end{macrocode}
%
% \latex/ package name.
% \begin{macrocode}
\DeclareRobustCommand{\pkg}{\category@index{package}}
% \end{macrocode}
%
% \latex/ option name.
% \begin{macrocode}
\DeclareRobustCommand{\opt}{\category@index{option}}
% \end{macrocode}
%
% Environment name.
% \begin{macrocode}
%\DeclareRobustCommand{\env}[1]{{\ntt#1}\SpecialEnvIndex{#1}}
%\DeclareRobustCommand{\env}{\category@index{environment}}
% \end{macrocode}
%
% File name.
% \begin{macrocode}
\DeclareRobustCommand{\fn}{\category@index{}}
% \end{macrocode}
%
% \bibtex/ style.
% \begin{macrocode}
\DeclareRobustCommand{\bst}{\category@index{\string\BibTeX{} style}}
% \end{macrocode}
%
% \begin{macrocode}
\DeclareRobustCommand{\cnt}{\category@index{counter}}
\DeclareRobustCommand{\fnt}{\category@index{font}}
% \end{macrocode}
%
% With long command names or file names we sometimes prefer to allow
% hyphenation in the tt font (in combination with suitable
% \cn{hyphenation} statements for individual documents). To make this
% work we must turn off the feature of \latex/ that disables the
% hyphenchar of the tt fonts.
%
% The method shown here depends on the assumption that OT1 encoding
% will be used for the tt fonts. An encoding-independent method would
% be more awkward: You'd have to explicitly load the relevant
% fonts, let's say by using \cn{AtBeginDocument}, and undo the
% hyphenchar change individually for each font.
%
% Instead we force loading, or possibly reloading (depending on the
% preload options used locally for creating the \latex/ format file),
% of the \fn{OT1/cmtt} fd file, and then clear the macro
% \cs{OT1+cmtt} which contains code to execute whenever a font of
% this family is first loaded. The default value is to turn off the
% hyphenchar, and that's what we don't want.
%
% This method is not especially palatable but other methods that
% don't involve loading the fd file are significantly less reliable.
% \begin{macrocode}
\def\allowtthyphens{\begingroup
\fontencoding{OT1}\fontfamily{cmtt}%
% \end{macrocode}
% Undefine the csname that \cs{try@load@fontshape} tests to determine
% whether the fd file needs loading. Then call
% \cs{try@load@fontshape}. Then we can remove the `turn off
% hyphenation' code, which as it happens resides in the same csname
% that was tested.
% \begin{macrocode}
\expandafter\let\csname OT1+cmtt\endcsname\relax
\try@load@fontshape
\endgroup
\expandafter\let\csname OT1+cmtt\endcsname\@empty
}
% \end{macrocode}
%
% We allow some slop at the right margin because we have some
% long control sequence names and verbatim text to deal with. Also
% ignore underfull hboxes and vboxes unless they are really bad.
% \begin{macrocode}
\hfuzz2pc
\vbadness9999 \hbadness5000
% \end{macrocode}
%
% \begin{macrocode}
\def\AmS{{\protect\usefont{OMS}{cmsy}{m}{n}%
A\kern-.1667em\lower.5ex\hbox{M}\kern-.125emS}}
% \end{macrocode}
%
% \begin{macrocode}
\def\latex/{{\protect\LaTeX}}
\def\amslatex/{{\protect\AmS-\protect\LaTeX}}
\def\tex/{{\protect\TeX}}
\def\amstex/{{\protect\AmS-\protect\TeX}}
\def\bibtex/{{Bib\protect\TeX}}
% \end{macrocode}
%
% \cn{makeindex} command is already used for other purposes.
% \begin{macrocode}
\def\makeindx/{MakeIndex}
% \end{macrocode}
%
% Don't allow a break after the hyphen:
% \begin{macrocode}
\def\xypic/{XY\mbox{-}pic}
% \end{macrocode}
%
% \begin{macrocode}
\newcommand{\Textures}{\textit{Textures}}
% \end{macrocode}
%
% `Meta' macro.
% \begin{macrocode}
\def\<#1>{\textit{$\langle$#1\/$\rangle$}}
% \end{macrocode}
%
% Reduce itemsep in lists.
% \begin{macrocode}
\def\@listi{%
\leftmargin\leftmargini
\topsep 3\p@ \@plus2\p@ \@minus\p@
\parsep \p@ \@plus\p@ \itemsep\parsep
}
\let\@listI\@listi
\@listi
\def\@listii{%
\leftmargin\leftmarginii
\labelwidth\leftmarginii \advance\labelwidth-\labelsep
\topsep\p@\@plus\p@ \@minus\p@
\parsep\z@skip \itemsep\z@skip
}
\def\@listiii{%
\leftmargin\leftmarginiii
\labelwidth\leftmarginiii \advance\labelwidth-\labelsep
\topsep\z@skip \parsep\z@skip \itemsep\z@skip
}
% \end{macrocode}
%
% An environment to encapsulate remarks relevant to old versions but
% not essential for the current version.
% \begin{macrocode}
\newenvironment{histnote}{%
\trivlist\item[\hspace{\labelsep}\bfseries Historical Note:]%
}{%
\endtrivlist
}
% \end{macrocode}
%
% Turn off \cs{autoindex} during \cn{tableofcontents} or similar.
% \begin{macrocode}
\def\@starttoc#1{\begingroup
\let\autoindex\@gobble
\makeatletter
\@input{\jobname.#1}\if@filesw
\expandafter\newwrite\csname tf@#1\endcsname
\immediate\openout
\csname tf@#1\endcsname \jobname.#1\relax
\fi \global\@nobreakfalse \endgroup}
% \end{macrocode}
%
% Make glossary commands a no-op for the moment. [mjd,1994/10/03]
% Provide a \cn{secref} command for section references.
% \begin{macrocode}
%<*amsldoc>
\newcommand{\gloss}[1]{}
%
\newcommand*{\secref}[1]{\S\ref{#1}}
% \end{macrocode}
%
% We can write |\qc{\%}| to quote a single
% character in situations where |\verb"%"| would not work, mainly
% when text is read as a macro argument (e.g., footnotes).
% \begin{macrocode}
\newcommand{\qc}[1]{}% check for prior definition
\edef\qc#1{\noexpand\protect\expandafter\noexpand\csname qc \endcsname
\noexpand\protect#1}
% \end{macrocode}
% For this function the first argument is \cn{protect} and just needs
% to be discarded. The method for removing a leading backslash is to
% turn off \cs{escapechar}; this is more forgiving of variations like
% |\qc{$}|. If the argument is `|\ |' we print a cmtt visible-space
% character, \qc{\ }.
% \begin{macrocode}
\@namedef{qc }#1#2{\begingroup\ntt
\ifx\ #2\char`\ \else\escapechar\m@ne\string#2\fi\endgroup}
% \end{macrocode}
% Declare a few character names to avoid e.g., indexing difficulties.
% \begin{macrocode}
\DeclareRobustCommand{\qcat}{\qc\@}%
\DeclareRobustCommand{\qcamp}{\qc\&}%
\DeclareRobustCommand{\qcbang}{\qc\!}%
% \end{macrocode}
%
% \begin{macro}{\arg}
% Change \cn{arg} to print a macro argument number:
% \begin{macrocode}
\DeclareRobustCommand{\arg}[1]{{\ntt\##1}}
% \end{macrocode}
% \end{macro}
%
% We need to emulate the \pkg{amsthm} \cn{qedsymbol} for the
% \amslatex/ user's guide.
% \begin{macrocode}
%<*amsldoc>
\newcommand{\openbox}{\leavevmode
\hbox to.77778em{%
\hfil\vrule
\vbox to.675em{\hrule width.6em\vfil\hrule}%
\vrule\hfil}}
\newcommand{\qedsymbol}{\openbox}
%
% \end{macrocode}
%
% Logical markup for e-mail address:
% \begin{macrocode}
%\def\mail{\texttt}
% \end{macrocode}
%
% Shorthand for indexing:
% \begin{macrocode}
%<*amsldoc>
\def\*#1{\def\@tempa{#1}\def\@tempb{*}%
\ifx\@tempa\@tempb \expandafter\index
\else #1\index{#1}\fi}
%
% \end{macrocode}
%
% Non-indexed \cn{cn} (maybe call this |\cn*|?)
% \begin{macrocode}
\def\ncn#1{{\let\index\@gobble\cn{#1}}}
% \end{macrocode}
% Indexing difficulties with !, @.
% \begin{macrocode}
\DeclareRobustCommand{\cnbang}{%
\ncn{\!}\index{"!@{\ntt\bslchar\qcbang}}}
\DeclareRobustCommand{\cnat}{%
\ncn{\!}\index{"@@{\ntt\bslchar\qcat}}}
% \end{macrocode}
%
% Shorthand for a discouraged, but not forbidden, line break:
% \begin{macrocode}
\def\5{\penalty500 }
% \end{macrocode}
%
% Environment for error message examples. Use \cs{meaning} to allow
% reading the error message text as an ordinary brace-delimited arg
% but still be able to print embedded braces; and first change the
% backslash catcode to prevent extra spaces after control words.
% \begin{macrocode}
%<*amsldoc>
\newenvironment{error}{%
\begingroup\catcode`\\=12 \expandafter\endgroup\errora
}{%
\endtrivlist
}
% \end{macrocode}
%
% \begin{macrocode}
\newcommand{\errora}[1]{%
\trivlist
\item[\hskip\labelsep\errorbullet\enspace
\ntt\frenchspacing\def\@tempa{#1}%
\expandafter\strip@prefix\meaning\@tempa]\leavevmode\par
}
% \end{macrocode}
% \cs{errorbullet} is just an attempt at a simple graphic device that
% doesn't require any special fonts.
% \begin{macrocode}
\newcommand{\errorbullet}{\rule[-.5pt]{2.5pt}{7.5pt}%
\rule[-.5pt]{5pt}{2.5pt}\kern-2.5pt%
\rule[4.5pt]{2.5pt}{2.5pt}}
%
% \end{macrocode}
% A couple of subheading commands:
% \begin{macrocode}
\newcommand{\errexa}{\par\noindent\textit{Example}:\ }
\newcommand{\errexpl}{\par\noindent\textit{Explanation}:\ }
% \end{macrocode}
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \section{\cls{amsldoc} style modifications for sectioning commands}
% The following section deals with book commands (part, chapter,
% frontmatter, \dots).
% \begin{macrocode}
%<*amsldoc>
% \end{macrocode}
%
% Modifications of sectioning commands from \fn{book.cls}, mostly
% reducing font sizes and vertical spacing.
% \begin{macrocode}
\renewcommand\frontmatter{\clearpage
\@mainmatterfalse\pagenumbering{roman}}
\renewcommand\mainmatter{\clearpage
\@mainmattertrue\pagenumbering{arabic}}
\renewcommand\backmatter{\clearpage \@mainmatterfalse}
% \end{macrocode}
%
% \begin{macrocode}
\renewcommand\part{\clearpage
\thispagestyle{plain}%
\if@twocolumn
\onecolumn
\@tempswatrue
\else
\@tempswafalse
\fi
\hbox{}\vfil
\secdef\@part\@spart}
% \end{macrocode}
%
% \begin{macrocode}
\def\@part[#1]#2{%
\ifnum \c@secnumdepth >-2\relax
\refstepcounter{part}%
\addcontentsline{toc}{part}{\thepart\hspace{1em}#1}%
\else
\addcontentsline{toc}{part}{#1}%
\fi
\markboth{}{}%
{\centering
\interlinepenalty \@M
\reset@font
\ifnum \c@secnumdepth >-2\relax
\Large\bfseries \partname~\thepart
\par
\vskip 20\p@
\fi
\Large \bfseries #2\par}%
\@endpart}
% \end{macrocode}
%
% \begin{macrocode}
\def\@spart#1{%
{\centering
\interlinepenalty \@M
\reset@font
\Large \bfseries #1\par}%
\@endpart}
\def\@endpart{\vfil\newpage
\if@twoside
\hbox{}%
\thispagestyle{empty}%
\newpage
\fi
\if@tempswa
\twocolumn
\fi}
%
% \end{macrocode}
%
% \begin{macrocode}
\renewcommand\chapter{\par \@afterindentfalse
\secdef\@chapter\@schapter}
\def\@chapter[#1]#2{\ifnum \c@secnumdepth >\m@ne
\if@mainmatter
\refstepcounter{chapter}%
\typeout{\@chapapp\space\thechapter.}%
\addcontentsline{toc}{chapter}%
{\protect\numberline{\thechapter}#1}%
\else
\addcontentsline{toc}{chapter}{#1}\fi
\else
\addcontentsline{toc}{chapter}{#1}
\fi
\chaptermark{#1}%
\addtocontents{lof}{\protect\addvspace{10\p@}}%
\addtocontents{lot}{\protect\addvspace{10\p@}}%
\if@twocolumn
\@topnewpage[\@makechapterhead{#2}]%
\else
\@makechapterhead{#2}%
\@afterheading
\fi}
% \end{macrocode}
%
% \begin{macrocode}
\def\@makechapterhead#1{%
\vspace{1.5\baselineskip}%
{\parindent \z@ \raggedright \reset@font
\ifnum \c@secnumdepth >\m@ne
\large\bfseries \@chapapp\space\thechapter
\par\nobreak
\vskip.5\baselineskip\relax
\fi
#1\par\nobreak
\vskip\baselineskip
}}
\def\@schapter#1{\if@twocolumn
\@topnewpage[\@makeschapterhead{#1}]%
\else
\@makeschapterhead{#1}%
\@afterheading
\fi}
\def\@makeschapterhead#1{%
\vspace*{1.5\baselineskip}%
{\parindent \z@ \raggedright
\reset@font
\large \bfseries #1\par\nobreak
\vskip\baselineskip
}}
% \end{macrocode}
%
% Add Donald Arseneau's \cs{@removefromreset}; used to decouple the
% footnote counter from \cn{chapter}, since chapters here do not
% automatically start on a new page. [bnb, 1999/09/27]
% \begin{verbatim}
% \@removefromreset{FOO}{BAR} : Removes counter FOO from the list of
% counters \cl@BAR to be reset when counter BAR
% is stepped. The opposite of \@addtoreset.
% \end{verbatim}
% \begin{macrocode}
\def\@removefromreset#1#2{\let\@tempb\@elt
\expandafter\let\expandafter\@tempa\csname c@#1\endcsname
\def\@elt##1{\expandafter\ifx\csname c@##1\endcsname\@tempa\else
\noexpand\@elt{##1}\fi}%
\expandafter\edef\csname cl@#2\endcsname{\csname cl@#2\endcsname}%
\let\@elt\@tempb}
\@removefromreset{footnote}{chapter}
% \end{macrocode}
%
% Change running head font to \cn{footnotesize}, nonslanted.
% \begin{macrocode}
\def\ps@headings{%
\let\@oddfoot\@empty\let\@evenfoot\@empty
\def\@evenhead{\thepage\hfil{\footnotesize\leftmark{}{}}}%
\def\@oddhead{{\footnotesize\rightmark{}{}}\hfil\thepage}%
\let\@mkboth\markboth
\def\chaptermark##1{%
\markboth {\uppercase{\ifnum \c@secnumdepth >\m@ne
\if@mainmatter
\@chapapp\ \thechapter. \ \fi
\fi
##1}}{}}%
\def\sectionmark##1{%
\markright {\uppercase{\ifnum \c@secnumdepth >\z@
\thesection. \ \fi
##1}}}}
% \end{macrocode}
%
%
% \section{\cls{amsdtx} style modifications for sectioning commands}
% These definitions for \cn{maketitle} are from \fn{article.cls}.
% \begin{macrocode}
%<*amsdtx>
\renewcommand\maketitle{\par
\begingroup
\renewcommand\thefootnote{\fnsymbol{footnote}}%
\def\@makefnmark{\hbox to\z@{$\m@th^{\@thefnmark}$\hss}}%
\long\def\@makefntext##1{\parindent 1em\noindent
\hbox to1.8em{\hss$\m@th^{\@thefnmark}$}##1}%
\if@twocolumn
\ifnum \col@number=\@ne
\@maketitle
\else
\twocolumn[\@maketitle]%
\fi
\else
\newpage
\global\@topnum\z@ % Prevents figures from going at top of page.
\@maketitle
\fi
\thispagestyle{plain}\@thanks
\endgroup
\setcounter{footnote}{0}%
\let\thanks\relax
\let\maketitle\relax\let\@maketitle\relax
\gdef\@thanks{}\gdef\@author{}\gdef\@title{}}
%
\def\@maketitle{%
\newpage
\null
\vskip 2em%
\begin{center}%
{\LARGE \@title \par}%
\vskip 1.5em%
{\large
\lineskip .5em%
\begin{tabular}[t]{c}%
\@author
\end{tabular}\par}%
\vskip 1em%
{\large \@date}%
\end{center}%
\par
% \end{macrocode}
% Put the title into both running heads.
% \begin{macrocode}
\uppercase\expandafter{\expandafter\toks@\expandafter{\@title}}%
\edef\@tempa{\noexpand\markboth{\the\toks@}{\the\toks@}}%
\@tempa
\vskip 1.5em}
%
% \end{macrocode}
%
% Edit the table of contents.
% \begin{macrocode}
%<*amsdtx>
\renewcommand\tableofcontents{%
\if@twocolumn
\@restonecoltrue\onecolumn
\else
\@restonecolfalse
\fi
\subsection*{\contentsname}%
\@starttoc{toc}%
\if@restonecol\twocolumn\fi
}
%
% \end{macrocode}
%
% Edit the sectioning commands.
% \begin{macrocode}
\renewcommand\section{\@startsection {section}{1}{\z@}%
{-.6\baselineskip \@plus -3\p@}%
{.4\baselineskip}
% {\reset@font\Large\bfseries}}
% {\reset@font\normalsize\bfseries}}
\renewcommand\subsection{\@startsection{subsection}{2}{\z@}%
{-.3\baselineskip\@plus -2\p@}%
{.2\baselineskip}%
% {\reset@font\large\bfseries}}
% {\reset@font\normalsize\bfseries}}
\renewcommand\subsubsection{\@startsection{subsubsection}{3}{\z@}%
{-.2\baselineskip\@plus -2\p@}%
{.2\baselineskip}%
{\reset@font\normalsize\bfseries}}
% \end{macrocode}
% Change index environment to turn off \cn{autoindex}.
% \begin{macrocode}
\renewenvironment{theindex}{%
\if@twocolumn \@restonecolfalse \else \@restonecoltrue \fi
\columnseprule \z@ \columnsep 35\p@
\let\autoindex\@gobble
% \twocolumn[\section*{\indexname}]%
% \twocolumn[\@makeschapterhead{\indexname}]%
\addcontentsline{toc}{chapter}{\indexname}%
\@mkboth{\uppercase{\indexname}}{\uppercase{\indexname}}%
\thispagestyle{plain}\parindent\z@
\parskip\z@ \@plus .3\p@\relax
\let\item\@idxitem
}{%
\if@restonecol\onecolumn\else\clearpage\fi
}
% \end{macrocode}
%
% Take out \cn{thechapter} from \cn{thesection}.
% \begin{macrocode}
%\renewcommand{\thesection}{\arabic{section}}
% \end{macrocode}
%
% Change the style of captions slightly. Also incorporate some
% caption improvements from Donald Arseneau (\fn{comp.text.tex}, 11
% Oct 1994).
% \begin{macrocode}
\long\def\@makecaption#1#2{%
\addvspace\abovecaptionskip
\begingroup
\countdef\@parcycles=8 % local count register
\@parcycles\z@
\@setpar{\advance\@parcycles\@ne \ifnum\@parcycles>999
\@@par\@parcycles\z@\fi
\ifhmode \unskip\hskip\parfillskip\penalty-\@M\fi}%
\@hangfrom{\textbf{#1.} }\vadjust{\penalty\m@ne}#2%
\endgroup
\ifhmode\unpenalty\fi\par
\ifnum\lastpenalty=\m@ne % only one line in the caption
\unpenalty \setbox\@tempboxa\lastbox
\nointerlineskip
\hbox to\hsize{\hfill\unhbox\@tempboxa\unskip\hfill}%
\fi
\nobreak\vskip\belowcaptionskip
}
% \end{macrocode}
% For table captions, assume top captions and so put space below the
% caption rather than above:
% \begin{macrocode}
\renewenvironment{table}{%
\belowcaptionskip\abovecaptionskip \abovecaptionskip\z@skip
\@float{table}%
}{%
\end@float
}
\renewenvironment{table*}{%
\belowcaptionskip\abovecaptionskip \abovecaptionskip\z@skip
\@dblfloat{table}%
}{%
\end@dblfloat
}
% \end{macrocode}
%
% \section{Float placement parameters}
% These control the placing of floating objects like tables and
% figures. The values here, which are much more tolerant than the
% \latex/ defaults, are more or less copied from \fn{amsclass.dtx}.
% \begin{macrocode}
\setcounter{topnumber}{4}\setcounter{bottomnumber}{4}
\setcounter{totalnumber}{4}\setcounter{dbltopnumber}{4}
\renewcommand{\topfraction}{.97}\renewcommand{\bottomfraction}{.97}
\renewcommand{\textfraction}{.03}\renewcommand{\floatpagefraction}{.9}
\renewcommand{\dbltopfraction}{.97}
\renewcommand{\dblfloatpagefraction}{.9}
\setlength{\floatsep}{8pt plus6pt}
\setlength{\textfloatsep}{10pt plus8pt}
\setlength{\intextsep}{8pt plus6pt}
\setlength{\dblfloatsep}{8pt plus6pt}
\setlength{\dbltextfloatsep}{10pt plus8pt}
\setlength{\@fptop}{0pt}\setlength{\@fpsep}{8pt}%
\setlength{\@fpbot}{0pt plus 1fil}
\setlength{\@dblfptop}{0pt}\setlength{\@dblfpsep}{8pt}%
\setlength{\@dblfpbot}{0pt plus 1fil}
% \end{macrocode}
% \begin{macrocode}
\pagestyle{headings}
% \end{macrocode}
%
% Make \verb"|...|" shorthand for verbatim fragments. In the case of
% the \cls{amsldoc} class, we avoid requiring an extra package
% (\pkg{doc} or \pkg{shortvrb}), to reduce the possibility of package
% files not being found at run time.
% \begin{macrocode}
%<*amsldoc>
\AtBeginDocument{\catcode`\|=\active }
\def\activevert{\verb|}
\expandafter\gdef\expandafter\dospecials\expandafter
{\dospecials \do\|}%
\expandafter\gdef\expandafter\@sanitize\expandafter
{\@sanitize \@makeother\|}
\begingroup\catcode`\|=\active \gdef|{\protect\activevert{}}\endgroup
%
% \end{macrocode}
%
% \begin{macro}{\arrayargpatch}
% If the column-specs arg of array or tabular contains a vert bar
% character, and we have made vert bars active, it will cause
% trouble. The following command, used in the ctab environment,
% prevents the trouble.
% \begin{macrocode}
\newcommand{\arrayargpatch}{%
\let\@oldarray\@array
\edef\@array[##1]##2{\catcode\number`\|=\number\catcode`\|
\catcode\number`\@=\number\catcode`\@ \relax
\let\noexpand\@array\noexpand\@oldarray
\noexpand\@array[##1]{##2}}%
\catcode`\|=12 \catcode`\@=12 \relax
}
% \end{macrocode}
% \end{macro}
%
% \begin{environment}{ctab}
% An environment for centered tables.
% \begin{macrocode}
\newenvironment{ctab}{%
\par\topsep\medskipamount
\trivlist\centering
\item[]%
\arrayargpatch
\begin{tabular}%
}{%
\end{tabular}%
\endtrivlist
}
% \end{macrocode}
% \end{environment}
%
% Load \pkg{doc} package, reset \cn{AltMacroFont} to be the same as
% \cn{MacroFont} (when there are large sections of conditional
% code I think it looks better not to have it all slanted).
% \begin{macrocode}
%<*amsdtx>
\RequirePackage{doc}
\def\AltMacroFont{\MacroFont}
% \end{macrocode}
%
% \begin{macro}{\SpecialMainEnvIndex}
% Override \fn{doc.sty}'s main environment indexing to get rid of
% the parens around ``environment'', for compatibility with our
% \cs{env} command.
% \begin{macrocode}
\def\SpecialMainEnvIndex#1{%
\@bsphack
\special@index{%
#1\actualchar\string\texttt{#1} environment\encapchar main%
}%
\special@index{%
environments:\levelchar#1%
\actualchar\string\texttt{#1}%
\encapchar main}%
\@esphack
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\SpecialEnvIndex}
% \begin{macrocode}
\def\SpecialEnvIndex#1{%
\@bsphack
\index{#1\actualchar\string\texttt{#1} environment\encapchar usage}%
\index{%
environments:\levelchar#1%
\actualchar\string\texttt{#1}%
\encapchar usage}%
\@esphack
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\DescribeOption}
% \begin{macrocode}
\def\DescribeOption{%
\leavevmode
\@bsphack
\begingroup
\MakePrivateLetters
\Describe@Option
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\Describe@Option}
% \begin{macrocode}
\def\Describe@Option#1{%
\endgroup
\marginpar{\raggedleft\PrintDescribeOption{#1}}%
\SpecialOptionIndex{#1}%
\@esphack
\ignorespaces
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\PrintDescribeOption}
% \begin{macrocode}
\def\PrintDescribeOption#1{\strut \MacroFont #1\ }
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\option}
% \begin{macrocode}
\def\option{%
\let\SpecialMainEnvIndex\SpecialMainOptionIndex
\begingroup
\catcode`\\12
\MakePrivateLetters \m@cro@ \iffalse}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\SpecialMainOptionIndex}
% \begin{macrocode}
\def\SpecialMainOptionIndex#1{%
\@bsphack
\special@index{#1\actualchar\string\texttt{#1} option\encapchar main}%
\@esphack
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\SpecialOptionIndex}
% \begin{macrocode}
\def\SpecialOptionIndex{\@category@index{option}}
% \end{macrocode}
% \end{macro}
%
% Ordinary \cn{DocInput} doesn't handle standardized file headers
% unless you enclose them in \cs{iffalse} \dots\ \cs{fi} which I
% don't care to do. So instead here's an alternate version of
% \cn{DocInput}, called \cn{hDocInput}.
% \begin{macrocode}
\def\hDocInput#1{\MakePercentIgnore
\begingroup
% \end{macrocode}
% Define active \qc{\@} which should be the first non-percent,
% non-equal-sign character when a file header is present. (If a file
% header is not present, \cn{hDocInput} should not be used.)
% \begin{macrocode}
\begingroup \lccode`\~=`\@
\lowercase{\endgroup\long\def ~}##1##{%
\catcode`\==12 \skipfileheader{##1}}%
\catcode`\@=\active \catcode`\==14 % comment
\def\filename{#1}%
\@@input#1 \MakePercentComment}
% \end{macrocode}
%
% \begin{macrocode}
\def\skipfileheader#1#2 {\endgroup
\hGetFileInfo#2 version = "??" date = "??"\@nil
\begingroup\catcode`\==9 \catcode`\ =9 \futurelet\0\endgroup
}
% \end{macrocode}
%
% \begin{macrocode}
\long\def\hGetFileInfo#1 version = "#2"#3 date = "#4"#5\@nil{%
\def\fileversion{#2}\def\filedate{#4}}
%
% \end{macrocode}
%
%
% \section{Hyphenation exceptions}
%
% \begin{macrocode}
\hyphenation{base-line-skip}
% \end{macrocode}
%
% \section{Index exceptions}
%
% A bunch of stuff we don't want in code indexes:
% \begin{macrocode}
%<*amsdtx>
\DoNotIndex{\@xp,\@nx,\@empty,\newcommand,\renewcommand}
\DoNotIndex{\newenvironment,\renewenvironment,\providecommand}
\DoNotIndex{\if,\fi,\ifnum,\fi,\@let@token,\futurelet,\fsa@n}
\DoNotIndex{\ignorespaces,\@tempcnta,\@tempcntb,\count@}
\DoNotIndex{\toks@,\@ne,\advance}
\DoNotIndex{\!,\/,\?,\@,\^,\_}
\DoNotIndex{\@@par,\@M,\@auxout,\@bsphack,\@esphack,\@depth,\@ehc}
\DoNotIndex{\@for,\@flushglue,\@gobble,\@gobbletwo,\@height,\@idxitem}
\DoNotIndex{\@ifnextchar,\@ifstar,\@ifundefined,\@input,\@latexerr}
\DoNotIndex{\@makeschapterhead,\@namedef,\@nameuse,\@nil}
\DoNotIndex{\@nobreakfalse,\@restonecolfalse,\@restonecoltrue}
\DoNotIndex{\@tempa,\@tempb,\@tempc,\@tempf}
\DoNotIndex{\@temptokena,\@temptokenb}
\DoNotIndex{\@themark,\@width}
\DoNotIndex{\active,\aindex,\baselineskip,\begin,\begingroup,\box}
\DoNotIndex{\c@page,\catcode,\chapter,\char,\chardef,\closeout}
\DoNotIndex{\CodelineIndex,\sp,\sb,\label,\leavevmode,\mark}
\DoNotIndex{\mark,\newinsert,\newwrite,\newtoks,\xdef}
\DoNotIndex{\columnsep,\columnseprule,\columnwidth,\csname,\def}
\DoNotIndex{\dimen,\do,\DocInput,\documentstyle,\edef,\em}
\DoNotIndex{\EnableCrossrefs,\end,\endcsname,\endgroup,\endinput}
\DoNotIndex{\everypar,\expandafter,\filedate,\fileversion}
\DoNotIndex{\footnotesize,\gdef,\global,\glossary,\hangindent}
\DoNotIndex{\if@filesw,\else,\fi}
\DoNotIndex{\if@nobreak,\if@twocolumn,\if@twoside,\fi,\fi,\fi}
\DoNotIndex{\hsize,\hskip}
\DoNotIndex{\ifhmode,\ifmmode,\ifodd,\ifvmode,\ifx,\fi,\fi,\fi,\fi,\fi}
\DoNotIndex{\ifcase,\ifdim,\ifeof,\iffalse,\iftrue,\fi,\fi,\fi,\fi,\fi}
\DoNotIndex{\ifcat,\fi}
\DoNotIndex{\immediate,\insert,\item,\jobname,\long}
\DoNotIndex{\let,\lineskip,\marginparsep,\marginparwidth,\maxdimen}
\DoNotIndex{\makeatletter,\noexpand,\openout,\protect,\rlap}
\DoNotIndex{\min,\newpage,\nobreak,\normalbaselineskip}
\DoNotIndex{\normallineskip,\p@,\par,\parfillskip,\parindent,\parskip}
\DoNotIndex{\penalty,\relax,\section,\sin,\sloppy,\space,\string}
\DoNotIndex{\tableofcontents,\the,\thepage,\thispagestyle,\toks,\tt}
\DoNotIndex{\twocolumn,\uppercase,\vbox,\vrule,\vskip,\vss}
\DoNotIndex{\write,\z@,\z@skip}
%
% \end{macrocode}
%
% The usual \cs{endinput} to ensure that random garbage at the end of
% the file doesn't get copied by \fn{docstrip}.
% \begin{macrocode}
\endinput
% \end{macrocode}
%
% \changes{v1.2b}{1995/02/15}{Added {}{} after rightmark, leftmark to
% handle no-maketitle case}
% \changes{v1.2b}{1995/02/15}{Added frenchspacing in error env heading}
%
% \changes{v1.2c}{1996/10/28}{Update version number, date for new release}
%
% \changes{v1.2d}{1997/03/13}{Fixed up loading method for OT1cmtt fd file}
%
% \changes{v2.03}{2004/04/06}{Reworked indexing commands for
% compatibility with doc.sty}
%
% \changes{v2.04}{2004/04/07}{Further work on indexing commands for
% compatibility with macro and environment environments in \fn{doc.sty}.
% Also added \env{option} environment, \cs{DescribeOption},
% \cs{PrintDescribeOption}, \cs{SpecialOptionIndex}, and
% \cs{SpecialMainOptionIndex}.}
%
% \changes{v2.05}{2004/04/27}{Fixed the amsdtx \cs{env} so that it
% prints its argument in addition to putting it in the index. Added
% |\penalty\exhyphenpenalty| to \cs{mdash} and \cs{ndash} as per
% \pkg{textcmds}.}
%
% \CheckSum{1569}
% \Finale