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% AMSBOOK.DOC						    July 1990      %
%                                                                          %
% This file is part of the AMS-LaTeX Version 1.0 distribution              %
%   American Mathematical Society, Technical Support Group,                %
%   P. O. Box 6248, Providence, RI 02940                                   %
%   800-321-4AMS (321-4267) or 401-455-4080                                %
%   Internet: Tech-Support@Math.AMS.com                                    %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\def\fileversion{v1.0b}
\def\filedate{90/06/25}
\def\docdate{90/06/25}

%% \CheckSum{546}
%% \CharacterTable
%%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%%   Digits        \0\1\2\3\4\5\6\7\8\9
%%   Exclamation   \!     Double quote  \"     Hash (number) \#
%%   Dollar        \$     Percent       \%     Ampersand     \&
%%   Acute accent  \'     Left paren    \(     Right paren   \)
%%   Asterisk      \*     Plus          \+     Comma         \,
%%   Minus         \-     Point         \.     Solidus       \/
%%   Colon         \:     Semicolon     \;     Less than     \<
%%   Equals        \=     Greater than  \>     Question mark \?
%%   Commercial at \@     Left bracket  \[     Backslash     \\
%%   Right bracket \]     Circumflex    \^     Underscore    \_
%%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%%   Right brace   \}     Tilde         \~}

% \StopEventually{}
%
% \section{The AMSBOOK documentstyle}
%
%      First the usual ID message.
%    \begin{macrocode}
\immediate\write\sixt@@n{%
  Document style `AMSBOOK' \fileversion\space <\filedate> (RK, MJD)}
\immediate\write\sixt@@n{%
  English documentation \space\@spaces\@spaces <\docdate> (MJD)}
%    \end{macrocode}
%      
%      The documentstyle AMSBOOK shares a lot of code in common with the AMSART
%      documentstyle.  In order to avoid maintaining two separate files with
%      the resulting tendency for them to get out of sync, we use a switch and
%      input amsart.sty, to load everything in amsart.sty that is shared in
%      common with amsbook.sty.  See amsart.sty for more details.
%    \begin{macrocode}
\let\if@article\iffalse
\input amsart.sty
%    \end{macrocode}
%      
% \subsection{Title page information}
%      In this section \verb=\@maketitle= is defined to produce a
%      simple title page and if information is such as key words
%      and subject classification numbers are also given they
%      will print on the page after the title page (i.e., on the
%      obverse side, in two-sided printing).
%    \begin{macrocode}
\def\@title[#1]#2{\def\thetitle@{\ignorespaces#2\unskip}}

\def\@author[#1]#2{\expandafter\def\expandafter
  \theauthors@\expandafter{\theauthors@#2\and}}
%    \end{macrocode}
%
%      This definition of \verb=\maketitle= is the same as in amsart.sty
%      except it does not refer to \verb=\sh@rtauthor=.
%    \begin{macrocode}
\def\maketitle{\par
  \@topnum\z@ % this prevents figures from falling at the top of page 1
  \begingroup
  \@maketitle
  \endgroup
  \thispagestyle{plain}%
  \c@footnote\z@
  \def\do##1{\let##1\relax}%
  \do\maketitle \do\@maketitle
  \do\title \do\@title \do\thetitle@
  \do\author \do\@author \do\theauthors@
  \do\dedicatory \do\thededicatory@
  \do\thanks \do\thethanks@
  \do\keywords \do\thekeywords@
  \do\subjclass \do\thesubjclass@
  \do\@andify
}

\def\@maketitle{\cleardoublepage \thispagestyle{empty}%
\begingroup \topskip\z@skip
\null\vfil 
\begingroup
        \centering \large\bf \openup\medskipamount
        \expandafter\uppercasetext@\expandafter{\thetitle@}\vfil
        \def\and{\par\bigskip}\mediumseries\theauthors@\vfil
\endgroup
\vfil\vfil
\newpage 
\null\vfil
\begingroup
        \parskip\medskipamount 
        \ifx\@empty\thetranslator@ \else
        Translator: \thetranslator@ \@@par\fi
        \thethanks@\@@par
\endgroup
\vfil
\ifx\@empty\thesubjclass@ \else
1980 {\it Mathematics Subject Classification} (1985 {\it Revision\/}).\enspace
Primary \thesubjclass@.\vfil
\fi
\ifx\@empty\thekeywords@ \else
{\it Key words and phrases.}\enspace \thekeywords@.\vfil
\fi
\ifvoid\addressb@x \else
Author addresses:\par
\unvbox\addressb@x\vfil\fi
\vfil\vfil
\endgroup}

\def\titlepage{\newpage\thispagestyle{empty}\c@page\z@}
\def\endtitlepage{\newpage}
%    \end{macrocode}
%
% \subsection{Part titles and chapter titles}
%      In the book style we redefine \verb=\part= to put the part
%      title on a separate page.  \verb=\@part= and \verb=\@spart=
%      are found in \verb=amsbk10.sty=.
%    \begin{macrocode}
\def\partname{Part}
\def\thepart{\@arabic\c@part}

\def\part{\cleardoublepage \thispagestyle{empty}% 
  \null\vfil  \markboth{}{}\secdef\@part\@spart}
%    \end{macrocode}
%
%      To print a part title in the table of contents, we make it like
%      a centered section heading since it is a major division.  
%      Argument \verb=#2=, the page number is discarded because
%      \verb=\part= will normally be followed immediately by
%      \verb=\chapter=, whose page number can be used for reference.
%    \begin{macrocode}
\def\l@part#1#2{\par\addpenalty\@secpenalty\medskip
  {\centering#1\par}\nobreak\@afterheading}
%    \end{macrocode}
%
%      Definitions for chapter titles.  Chapter titles and part titles
%      are the only things that use fonts larger than
%      \verb=\normalsize=.  (Well, also the title page if the author
%      uses \verb=\maketitle=.)
%    \begin{macrocode}
\newcounter{chapter}

\def\chapter{\cleardoublepage \thispagestyle{plain} \global\@topnum\z@
  \@afterindentfalse \secdef\@chapter\@schapter}

\def\@chapter[#1]#2{\refstepcounter{\@string\chapter}%
  \typeout{\chaptername\space\thechapter}%
  \addcontentsline{toc}{\@string\chapter}{%
    \ifnum \c@secnumdepth >\m@ne
      \protect\numberline{\chaptername\ \thechapter.}\fi #1}%
  \chaptermark{\ifnum\c@secnumdepth >\m@ne \thechapter. \fi
       \ignorespaces#1\unskip}%
  \addtocontents{lof}{\protect\addvspace{10\p@}}%
  \addtocontents{lot}{\protect\addvspace{10\p@}}%
  \@makechapterhead{#2}\@afterheading}

\def\@schapter#1{\typeout{#1}%
  \addcontentsline{toc}{\@string\chapter}{#1}%
  \chaptermark{\ignorespaces#1\unskip}%
  \addtocontents{lof}{\protect\addvspace{10\p@}}%
  \addtocontents{lot}{\protect\addvspace{10\p@}}%
  \@makeschapterhead{#1}\@afterheading}

\def\chaptername{Chapter}
\def\thechapter{\@Roman\c@chapter}

\def\l@chapter{\@tocline\medskipamount{2em}{\normalshape\bf}}

\@addtoreset{section}{chapter}

\def\appendix{\par
  \c@chapter\z@ \c@section\z@
  \def\chaptername{Appendix}%
  \def\thechapter{\@Alph\c@chapter}}
%    \end{macrocode}
%      Since table of contents, list of figures and list of figures
%      are identical in design as far as the chapter heading and other
%      preliminaries go, we redefine \verb=\@starttoc= to do the necessary
%      work, rather than defining a new macro (which would use up another
%      control sequence name).
%    \begin{macrocode}
\def\@starttoc#1#2{\begingroup
%    \end{macrocode}
%      Inside this group we change \verb=\secdef= so that we can call
%      \verb=\chapter= and only get the preliminary part of its definition
%      that we need.
%    \begin{macrocode}
  \let\secdef\@gobbletwo \chapter 
%    \end{macrocode}
%      If we have a list of figures or list of tables we want to put
%      them in the main table of contents, but we don't want to put an
%      entry there for the main table of contents itself. So we check
%      to see if argument 2 is \verb=\contentsname= and if it is then
%      we refrain from doing \verb=\addcontentsline=.
%    \begin{macrocode}
  \ifx#2\contentsname \else
    \addcontentsline{toc}{\@string\chapter}#2\fi
%    \end{macrocode}
%      Now we do the equivalent of \verb=\@schapter=.
%    \begin{macrocode}
  \typeout#2\chaptermark#2\@makeschapterhead#2\@afterheading
%    \end{macrocode}
%      And finally we call in the original definition of
%      \verb=\@starttoc=.
%    \begin{macrocode}
  \makeatletter  
  \@input{\jobname.#1}\if@filesw \expandafter\newwrite\csname tf@#1\endcsname
             \expandafter\openout \csname tf@#1\endcsname \jobname.#1\relax
  \fi \global\@nobreakfalse \endgroup
  \newpage
}
%    \end{macrocode}
%      Now it is easy to define \verb=\tableofcontents= and its relatives.
%    \begin{macrocode}
\def\tableofcontents{\@starttoc{toc}\contentsname}
\def\listoffigures{\@starttoc{lof}\listfigurename}
\def\listoftables{\@starttoc{lot}\listtablename}

\def\listfigurename{List of Figures}
\def\listtablename{List of Tables}

\def\l@figure{\@dottedtocline{1}{1.5em}{2.3em}}
\let\l@table=\l@figure

\setcounter{tocdepth}{3}
\setcounter{secnumdepth}{3}
%    \end{macrocode}
%      The heading for a bibliography is done like this.
%    \begin{macrocode}
\def\thebibliography#1{\chapter*\bibname
  \list{[\@arabic\c@enumi]}{\settowidth\labelwidth{[#1]}\leftmargin\labelwidth
  \advance\leftmargin\labelsep \usecounter{enumi}}\sloppy
  \clubpenalty9999 \widowpenalty\clubpenalty  \sfcode`\.\@m
  \small}

\let\endthebibliography=\endlist
%    \end{macrocode}
%      Chapter heading for an index.  Index is set up to be two
%      columns.
%    \begin{macrocode}
\newif\if@restonecol
\def\theindex{\@restonecoltrue\if@twocolumn\@restonecolfalse\fi
  \columnseprule\z@ \columnsep 35\p@
  \twocolumn[\@makeschapterhead\indexname]\chaptermark\indexname
  \thispagestyle{plain}\let\item\@idxitem
  \parindent\z@  \parskip\z@\@plus.3\p@\relax
  \small}

\def\indexname{Index}

\def\@idxitem{\par\hangindent 4em}
\def\subitem{\par\hangindent 4em\hspace*{2em}}
\def\subsubitem{\par\hangindent 4em\hspace*{3em}}
\def\endtheindex{\if@restonecol\onecolumn\else\clearpage\fi}
\def\indexspace{\par\bigskip}
%    \end{macrocode}
%      Miscellaneous numbering settings.
%    \begin{macrocode}
\@addtoreset{footnote}{chapter}

\def\thefigure{\thechapter.\@arabic\c@figure}
\def\thetable{\thechapter.\@arabic\c@table}
%    \end{macrocode}
%
%      Some theorem style parameters that vary from amsart.sty are
%      defined here, and we change the remark environment to use the
%      default `header font' (small caps) rather than italic.
%    \begin{macrocode}
\def\theorem@headerfont{\sc}
\let\theorem@indent\indent

\def\th@remark{\theorempreskipamount6\p@\@plus6\p@
    \theorempostskipamount\z@\@plus6\p@
    \normalshape}
%    \end{macrocode}
%
%      In the amsbook style the `pf' environment uses paragraph
%      indent, and small caps instead of italic for the word
%      ``Proof''.
%    \begin{macrocode}
\newenvironment{pf}{\par\addvspace{6\p@\@plus6\p@}%
  \indent{\sc\proofname.}\enspace
  \ignorespaces}{\qed\par\addvspace{6\p@\@plus6\p@}}

\@namedef{pf*}#1{\begingroup\def\proofname{#1}\pf\endgroup
  \ignorespaces}
\expandafter\let\csname endpf*\endcsname=\endpf
%    \end{macrocode}
%      
%      Running heads.  We need some extra \verb=\expandafters= to
%      expand \verb=\leftmark= before applying \verb=\uppercasetext@=.
%    \begin{macrocode}
\def\ps@headings{\let\@mkboth\markboth
  \let\@oddfoot\@empty\let\@evenfoot\@empty
  \def\@evenhead{\small \rlap{\thepage}\hfil 
       \expandafter\expandafter\expandafter\uppercasetext@
       \expandafter\expandafter\expandafter
       {\leftmark}\hfil}
  \def\@oddhead{\small \hfil 
       \expandafter\expandafter\expandafter\uppercasetext@
       \expandafter\expandafter\expandafter
       {\rightmark}\hfil \llap{\thepage}}
  \def\chaptermark##1{\@mkboth{##1}{##1}}
  \let\sectionmark\markright}

\def\ps@myheadings{\let\@mkboth\@gobbletwo
  \def\@oddhead{\small\rightmark \hfil\thepage}\let\@oddfoot\@empty
  \def\@evenhead{\small\thepage\hfil\leftmark}\let\@evenfoot\@empty
  \let\chaptermark\@gobble \let\sectionmark\@gobble}

\let\subsectionmark\@gobble 
\let\subsubsectionmark\@gobble
\let\paragraphmark\@gobble

%    \end{macrocode}
%      
%      Initialization.
%      We set the margins here (now that \verb=\textwidth= and
%      \verb=\textheight= values have been determined).
%
%      Subtract the height of the running heads:
%    \begin{macrocode}
\advance\textheight by -\headheight
\advance\textheight by -\headsep
%    \end{macrocode}
%      Subtract the difference between normalbaselineskip and topskip:
%    \begin{macrocode}
\advance\textheight by -\normalbaselineskip 
\advance\textheight by \topskip
%    \end{macrocode}
%      We set \verb=\oddsidemargin= and \verb=\evensidemargin= to
%      center the text on the page.
%    \begin{macrocode}
\oddsidemargin=8.5 true in % standard U.S. paper width
\advance\oddsidemargin by -\textwidth
\oddsidemargin=.5\oddsidemargin
%    \end{macrocode}
%      Now we subtract the default margin provided by standard DVI
%      drivers.  But first we make sure that the final margin will
%      be at least .5 inch.
%    \begin{macrocode}
\ifdim\oddsidemargin < .5 true in
  \oddsidemargin = .5 true in \fi
\advance\oddsidemargin by -1 true in 
\evensidemargin=\oddsidemargin
%    \end{macrocode}
%     And we set \verb=\topmargin= to get vertical centering as well.
%    \begin{macrocode}
\topmargin=11 true in % standard U.S. paper width
\advance\topmargin by -\textheight
\advance\topmargin by -\headheight
\advance\topmargin by -\headsep
\advance\topmargin by -\footheight
\advance\topmargin by -\footskip
\topmargin=.5\topmargin
%    \end{macrocode}
%      We provide a minimum of .5in (after compensating  for the default
%      margin---see next step).
%    \begin{macrocode}
\ifdim\topmargin<.5 true in
  \topmargin=.5 true in \fi
%    \end{macrocode}
%      Now subtract the default margin provided by standard DVI
%      drivers.
%    \begin{macrocode}
\advance\topmargin by -1 true in 
%
\mark{{}{}} 
\ps@headings

\pagenumbering{arabic}
\@twosidetrue \@mparswitchtrue   % this = `twoside' option
\onecolumn
%    \end{macrocode}
% \Finale
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