reintroduced code that keeps track of whether the Isabelle and Metis proofs are in sync -- generalized to work with the new skolemizer
% tutorial.sty : Isabelle Tutorial Page Layout
%
\typeout{Document Style tutorial. Released 9 July 2001}
\hyphenation{Isa-belle man-u-script man-u-scripts ap-pen-dix mut-u-al-ly}
\hyphenation{data-type data-types co-data-type co-data-types }
%usage: \iflabelundefined{LABEL}{if not defined}{if defined}
\newcommand{\iflabelundefined}[1]{\@ifundefined{r@#1}}
%%%INDEXING use isa-index to process the index
\newcommand\seealso[2]{\emph{see also} #1}
\usepackage{makeidx}
%index, putting page numbers of definitions in boldface
\def\bold#1{\textbf{#1}}
\newcommand\fnote[1]{#1n}
\newcommand\indexbold[1]{\index{#1|bold}}
% The alternative to \protect\isa in the indexing macros is
% \noexpand\noexpand \noexpand\isa
% need TWO levels of \noexpand to delay the expansion of \isa:
% the \noexpand\noexpand will leave one \noexpand, to be given to the
% (still unexpanded) \isa token. See TeX by Topic, page 122.
%%%% for indexing constants, symbols, theorems, ...
\newcommand\cdx[1]{\isa{#1}\index{#1@\protect\isa{#1} (constant)}}
\newcommand\sdx[1]{\isa{#1}\index{#1@\protect\isa{#1} (symbol)}}
\newcommand\sdxpos[2]{\isa{#1}\index{#2@\protect\isa{#1} (symbol)}}
\newcommand\tdx[1]{\isa{#1}\index{#1@\protect\isa{#1} (theorem)}}
\newcommand\tdxbold[1]{\isa{#1}\index{#1@\protect\isa{#1} (theorem)|bold}}
\newcommand\cldx[1]{\isa{#1}\index{#1@\protect\isa{#1} (class)}}
\newcommand\tydx[1]{\isa{#1}\index{#1@\protect\isa{#1} (type)}}
\newcommand\tcdx[1]{\isa{#1}\index{#1@\protect\isa{#1} (type class)}}
\newcommand\thydx[1]{\isa{#1}\index{#1@\protect\isa{#1} (theory)}}
\newcommand\attrdx[1]{\isa{#1}\index{#1@\protect\isa{#1} (attribute)}}
\newcommand\cmmdx[1]{\index{#1@\protect\isacommand{#1} (command)}}
\newcommand\commdx[1]{\isacommand{#1}\index{#1@\protect\isacommand{#1} (command)}}
\newcommand\methdx[1]{\isa{#1}\index{#1@\protect\isa{#1} (method)}}
\newcommand\tooldx[1]{\isa{#1}\index{#1@\protect\isa{#1} (tool)}}
\newcommand\settdx[1]{\isa{#1}\index{#1@\protect\isa{#1} (setting)}}
\newcommand\pgdx[1]{\pgmenu{#1}\index{#1@\protect\pgmenu{#1} (Proof General)}}
%set argument in \bf font and index in ROMAN font (for definitions in text!)
\newcommand\bfindex[1]{{\bf#1}\index{#1|bold}\@}
\newcommand\rmindex[1]{{#1}\index{#1}\@}
\newcommand\ttindex[1]{\texttt{#1}\index{#1@\texttt{#1}}\@}
\newcommand\ttindexbold[1]{\texttt{#1}\index{#1@\texttt{#1}|bold}\@}
\newcommand{\isadxpos}[2]{\isa{#1}\index{#2@\protect\isa{#1}}\@}
\newcommand{\isadxboldpos}[2]{\isa{#1}\index{#2@\protect\isa{#1}|bold}\@}
%Commented-out the original versions to see what the index looks like without them.
% In any event, they need to use \isa or \protect\isa rather than \texttt.
%%\newcommand{\indexboldpos}[2]{#1\index{#2@#1|bold}\@}
%%\newcommand{\ttindexboldpos}[2]{\texttt{#1}\index{#2@\texttt{#1}|bold}\@}
\newcommand{\indexboldpos}[2]{#1\@}
\newcommand{\ttindexboldpos}[2]{\isa{#1}\@}
%\newtheorem{theorem}{Theorem}[section]
\newtheorem{Exercise}{Exercise}[section]
\newenvironment{exercise}{\begin{Exercise}\rm}{\end{Exercise}}
\newcommand{\ttlbr}{\texttt{[|}}
\newcommand{\ttrbr}{\texttt{|]}}
\newcommand{\ttor}{\texttt{|}}
\newcommand{\ttall}{\texttt{!}}
\newcommand{\ttuniquex}{\texttt{?!}}
\newcommand{\ttEXU}{\texttt{EX!}}
\newcommand{\ttAnd}{\texttt{!!}}
\newcommand{\isasymignore}{}
\newcommand{\isasymimp}{\isasymlongrightarrow}
\newcommand{\isasymImp}{\isasymLongrightarrow}
\newcommand{\isasymFun}{\isasymRightarrow}
\newcommand{\isasymuniqex}{\isamath{\exists!\,}}
\renewcommand{\S}{Sect.\ts}
\renewenvironment{isamarkuptxt}{\begin{isamarkuptext}}{\end{isamarkuptext}}
\newif\ifremarks
\newcommand{\REMARK}[1]{\ifremarks\marginpar{\raggedright\footnotesize#1}\fi}
%names of Isabelle rules
\newcommand{\rulename}[1]{\hfill(#1)}
\newcommand{\rulenamedx}[1]{\hfill(#1\index{#1@\protect\isa{#1} (theorem)|bold})}
%%%% meta-logical connectives
\let\Forall=\bigwedge
\let\Imp=\Longrightarrow
\let\To=\Rightarrow
\newcommand{\Var}[1]{{?\!#1}}
%%% underscores as ordinary characters, not for subscripting
%% use @ or \sb for subscripting; use \at for @
%% only works in \tt font
%% must not make _ an active char; would make \ttindex fail!
\gdef\underscoreoff{\catcode`\@=8\catcode`\_=\other}
\gdef\underscoreon{\catcode`\_=8\makeatother}
\chardef\other=12
\chardef\at=`\@
% alternative underscore
\def\_{\leavevmode\kern.06em\vbox{\hrule height.2ex width.3em}\hskip0.1em}
%%%% ``WARNING'' environment: 2 ! characters separated by negative thin space
\def\warnbang{\vtop to 0pt{\vss\hbox{\Huge\bf!\!!}\vss}}
\newenvironment{warn}{\medskip\medbreak\begingroup \clubpenalty=10000
\small %%WAS\baselineskip=0.9\baselineskip
\noindent \hangindent\parindent \hangafter=-2
\hbox to0pt{\hskip-\hangindent\warnbang\hfill}\ignorespaces}%
{\par\endgroup\medbreak}
%%%% ``PROOF GENERAL'' environment
\def\pghead{\lower3pt\vbox to 0pt{\vss\hbox{\includegraphics[width=12pt]{pghead}}\vss}}
\newenvironment{pgnote}{\medskip\medbreak\begingroup \clubpenalty=10000
\small \noindent \hangindent\parindent \hangafter=-2
\hbox to0pt{\hskip-\hangindent \pghead\hfill}\ignorespaces}%
{\par\endgroup\medbreak}
\newcommand{\pgmenu}[1]{\textsf{#1}}
%%%% Standard logical symbols
\let\turn=\vdash
\let\conj=\wedge
\let\disj=\vee
\let\imp=\rightarrow
\let\bimp=\leftrightarrow
\newcommand\all[1]{\forall#1.} %quantification
\newcommand\ex[1]{\exists#1.}
\newcommand{\pair}[1]{\langle#1\rangle}
\newcommand{\lparr}{\mathopen{(\!|}}
\newcommand{\rparr}{\mathclose{|\!)}}
\newcommand{\fs}{\mathpunct{,\,}}
\newcommand{\ty}{\mathrel{::}}
\newcommand{\asn}{\mathrel{:=}}
\newcommand{\more}{\ldots}
\newcommand{\record}[1]{\lparr #1 \rparr}
\newcommand{\dtt}{\mathord.}
\newcommand\lbrakk{\mathopen{[\![}}
\newcommand\rbrakk{\mathclose{]\!]}}
\newcommand\List[1]{\lbrakk#1\rbrakk} %was \obj
\newcommand\vpile[1]{\begin{array}{c}#1\end{array}}
\newenvironment{matharray}[1]{\[\begin{array}{#1}}{\end{array}\]}
\newcommand{\Text}[1]{\mbox{#1}}
\DeclareMathSymbol{\dshsym}{\mathalpha}{letters}{"2D}
\newcommand{\dsh}{\mathit{\dshsym}}
\let\int=\cap
\let\un=\cup
\let\inter=\bigcap
\let\union=\bigcup
\def\ML{{\sc ml}}
\def\AST{{\sc ast}}
%macros to change the treatment of symbols
\def\relsemicolon{\mathcode`\;="303B} %treat ; like a relation
\def\binperiod{\mathcode`\.="213A} %treat . like a binary operator
\def\binvert{\mathcode`\|="226A} %treat | like a binary operator
%redefinition of \sloppy and \fussy to use \emergencystretch
\def\sloppy{\tolerance2000 \hfuzz.5pt \vfuzz.5pt \emergencystretch=15pt}
\def\fussy{\tolerance200 \hfuzz.1pt \vfuzz.1pt \emergencystretch=0pt}
%non-bf version of description
\def\descrlabel#1{\hspace\labelsep #1}
\def\descr{\list{}{\labelwidth\z@ \itemindent-\leftmargin\let\makelabel\descrlabel}}
\let\enddescr\endlist
% The mathcodes for the letters A, ..., Z, a, ..., z are changed to
% generate text italic rather than math italic by default. This makes
% multi-letter identifiers look better. The mathcode for character c
% is set to |"7000| (variable family) + |"400| (text italic) + |c|.
%
\DeclareSymbolFont{italics}{\encodingdefault}{\rmdefault}{m}{it}%
\def\@setmcodes#1#2#3{{\count0=#1 \count1=#3
\loop \global\mathcode\count0=\count1 \ifnum \count0<#2
\advance\count0 by1 \advance\count1 by1 \repeat}}
\@setmcodes{`A}{`Z}{"7\hexnumber@\symitalics41}
\@setmcodes{`a}{`z}{"7\hexnumber@\symitalics61}