lib/texinputs/isabelle.sty

clarified package name (actually both pxfonts and txfonts exist and have this font);

%%
%% macros for Isabelle generated LaTeX output
%%

%%% Simple document preparation (based on theory token language and symbols)

% isabelle environments

\newcommand{\isabellecontext}{UNKNOWN}
\newcommand{\setisabellecontext}[1]{\def\isabellecontext{#1}}

\newcommand{\isastyle}{\UNDEF}
\newcommand{\isastylett}{\UNDEF}
\newcommand{\isastyleminor}{\UNDEF}
\newcommand{\isastyleminortt}{\UNDEF}
\newcommand{\isastylescript}{\UNDEF}
\newcommand{\isastyletext}{\normalsize\normalfont\rmfamily}
\newcommand{\isastyletxt}{\normalfont\rmfamily}
\newcommand{\isastylecmt}{\normalfont\rmfamily}

\newcommand{\isaspacing}{%
  \sfcode 42 1000 % .
  \sfcode 63 1000 % ?
  \sfcode 33 1000 % !
  \sfcode 58 1000 % :
  \sfcode 59 1000 % ;
  \sfcode 44 1000 % ,
}

%symbol markup -- \emph achieves decent spacing via italic corrections
\newcommand{\isamath}[1]{\emph{$#1$}}
\newcommand{\isatext}[1]{\emph{#1}}
\DeclareRobustCommand{\isascriptstyle}{\def\isamath##1{##1}\def\isatext##1{\mbox{\isaspacing\isastylescript##1}}}
\newcommand{\isactrlsub}[1]{\emph{\isascriptstyle${}\sb{#1}$}}
\newcommand{\isactrlsup}[1]{\emph{\isascriptstyle${}\sp{#1}$}}
\DeclareRobustCommand{\isactrlbsub}{\emph\bgroup\math{}\sb\bgroup\mbox\bgroup\isaspacing\isastylescript}
\DeclareRobustCommand{\isactrlesub}{\egroup\egroup\endmath\egroup}
\DeclareRobustCommand{\isactrlbsup}{\emph\bgroup\math{}\sp\bgroup\mbox\bgroup\isaspacing\isastylescript}
\DeclareRobustCommand{\isactrlesup}{\egroup\egroup\endmath\egroup}
\newcommand{\isactrlbold}[1]{{\bfseries\upshape\boldmath#1}}

%blackboard-bold (requires font txmia from pxfonts)
\DeclareSymbolFont{bbbfont}{U}{txmia}{m}{it}
\SetSymbolFont{bbbfont}{bold}{U}{txmia}{bx}{it}
\DeclareMathSymbol{\bbbA}{\mathord}{bbbfont}{129}
\DeclareMathSymbol{\bbbB}{\mathord}{bbbfont}{130}
\DeclareMathSymbol{\bbbC}{\mathord}{bbbfont}{131}
\DeclareMathSymbol{\bbbD}{\mathord}{bbbfont}{132}
\DeclareMathSymbol{\bbbE}{\mathord}{bbbfont}{133}
\DeclareMathSymbol{\bbbF}{\mathord}{bbbfont}{134}
\DeclareMathSymbol{\bbbG}{\mathord}{bbbfont}{135}
\DeclareMathSymbol{\bbbH}{\mathord}{bbbfont}{136}
\DeclareMathSymbol{\bbbI}{\mathord}{bbbfont}{137}
\DeclareMathSymbol{\bbbJ}{\mathord}{bbbfont}{138}
\DeclareMathSymbol{\bbbK}{\mathord}{bbbfont}{139}
\DeclareMathSymbol{\bbbL}{\mathord}{bbbfont}{140}
\DeclareMathSymbol{\bbbM}{\mathord}{bbbfont}{141}
\DeclareMathSymbol{\bbbN}{\mathord}{bbbfont}{142}
\DeclareMathSymbol{\bbbO}{\mathord}{bbbfont}{143}
\DeclareMathSymbol{\bbbP}{\mathord}{bbbfont}{144}
\DeclareMathSymbol{\bbbQ}{\mathord}{bbbfont}{145}
\DeclareMathSymbol{\bbbR}{\mathord}{bbbfont}{146}
\DeclareMathSymbol{\bbbS}{\mathord}{bbbfont}{147}
\DeclareMathSymbol{\bbbT}{\mathord}{bbbfont}{148}
\DeclareMathSymbol{\bbbU}{\mathord}{bbbfont}{149}
\DeclareMathSymbol{\bbbV}{\mathord}{bbbfont}{150}
\DeclareMathSymbol{\bbbW}{\mathord}{bbbfont}{151}
\DeclareMathSymbol{\bbbX}{\mathord}{bbbfont}{152}
\DeclareMathSymbol{\bbbY}{\mathord}{bbbfont}{153}
\DeclareMathSymbol{\bbbZ}{\mathord}{bbbfont}{154}
\newcommand{\checkbbbfont}{{%
\setbox\@tempboxa=\hbox{$\bbbA$}%
\ifdim\wd\@tempboxa=\z@\PackageError{isabelle/pxfonts}{Missing font txmia}{}\fi}}

\newenvironment{isaantiq}{{\isacharat\isacharbraceleft}}{{\isacharbraceright}}

\newdimen\isa@parindent\newdimen\isa@parskip

\newenvironment{isabellebody}{%
\isamarkuptrue\par%
\isa@parindent\parindent\parindent0pt%
\isa@parskip\parskip\parskip0pt%
\isaspacing\isastyle}{\par}

\newenvironment{isabellebodytt}{%
\isamarkuptrue\par%
\isa@parindent\parindent\parindent0pt%
\isa@parskip\parskip\parskip0pt%
\isaspacing\isastylett}{\par}

\newenvironment{isabelle}
{\begin{trivlist}\begin{isabellebody}\item\relax}
{\end{isabellebody}\end{trivlist}}

\newenvironment{isabellett}
{\begin{trivlist}\begin{isabellebodytt}\item\relax}
{\end{isabellebodytt}\end{trivlist}}

\newcommand{\isa}[1]{\emph{\isaspacing\isastyleminor #1}}
\newcommand{\isatt}[1]{\emph{\isaspacing\isastyleminortt #1}}

\newcommand{\isaindent}[1]{\hphantom{#1}}
\newcommand{\isanewline}{\mbox{}\par\mbox{}}
\newcommand{\isasep}{}
\newcommand{\isadigit}[1]{#1}

\newcommand{\isachardefaults}{%
\def\isacharbell{\isamath{\bigbox}}%requires stmaryrd
\chardef\isacharbang=`\!%
\chardef\isachardoublequote=`\"%
\chardef\isachardoublequoteopen=`\"%
\chardef\isachardoublequoteclose=`\"%
\chardef\isacharhash=`\#%
\chardef\isachardollar=`\$%
\chardef\isacharpercent=`\%%
\chardef\isacharampersand=`\&%
\chardef\isacharprime=`\'%
\chardef\isacharparenleft=`\(%
\chardef\isacharparenright=`\)%
\chardef\isacharasterisk=`\*%
\chardef\isacharplus=`\+%
\chardef\isacharcomma=`\,%
\chardef\isacharminus=`\-%
\chardef\isachardot=`\.%
\chardef\isacharslash=`\/%
\chardef\isacharcolon=`\:%
\chardef\isacharsemicolon=`\;%
\chardef\isacharless=`\<%
\chardef\isacharequal=`\=%
\chardef\isachargreater=`\>%
\chardef\isacharquery=`\?%
\chardef\isacharat=`\@%
\chardef\isacharbrackleft=`\[%
\chardef\isacharbackslash=`\\%
\chardef\isacharbrackright=`\]%
\chardef\isacharcircum=`\^%
\chardef\isacharunderscore=`\_%
\def\isacharunderscorekeyword{\_}%
\chardef\isacharbackquote=`\`%
\chardef\isacharbackquoteopen=`\`%
\chardef\isacharbackquoteclose=`\`%
\chardef\isacharbraceleft=`\{%
\chardef\isacharbar=`\|%
\chardef\isacharbraceright=`\}%
\chardef\isachartilde=`\~%
\def\isacharverbatimopen{\isacharbraceleft\isacharasterisk}%
\def\isacharverbatimclose{\isacharasterisk\isacharbraceright}%
\def\isacartoucheopen{\isatext{\guilsinglleft}}%
\def\isacartoucheclose{\isatext{\guilsinglright}}%
}


% keyword and section markup

\newcommand{\isakeyword}[1]
{\emph{\normalfont\bfseries\def\isachardot{.}\def\isacharunderscore{\isacharunderscorekeyword}%
\def\isacharbraceleft{\{}\def\isacharbraceright{\}}#1}}
\newcommand{\isacommand}[1]{\isakeyword{#1}}

\newcommand{\isakeywordcontrol}[1]
{\emph{\normalfont\bfseries\itshape\def\isacharunderscore{\isacharunderscorekeyword}#1\,}}

\newcommand{\isamarkupchapter}[1]{\chapter{#1}}
\newcommand{\isamarkupsection}[1]{\section{#1}}
\newcommand{\isamarkupsubsection}[1]{\subsection{#1}}
\newcommand{\isamarkupsubsubsection}[1]{\subsubsection{#1}}
\newcommand{\isamarkupparagraph}[1]{\paragraph{#1}}
\newcommand{\isamarkupsubparagraph}[1]{\subparagraph{#1}}

\newif\ifisamarkup
\newcommand{\isabeginpar}{\par\ifisamarkup\relax\else\medskip\fi}
\newcommand{\isaendpar}{\par\medskip}
\newenvironment{isapar}{\parindent\isa@parindent\parskip\isa@parskip\isabeginpar}{\isaendpar}
\newenvironment{isamarkuptext}{\par\isastyletext\begin{isapar}}{\end{isapar}}
\newenvironment{isamarkuptxt}{\par\isastyletxt\begin{isapar}}{\end{isapar}}
\newcommand{\isamarkupcmt}[1]{{\isastylecmt--- #1}}


% styles

\def\isabellestyle#1{\csname isabellestyle#1\endcsname}

\newcommand{\isabellestyledefault}{%
\def\isastyle{\small\normalfont\ttfamily\slshape}%
\def\isastylett{\small\normalfont\ttfamily}%
\def\isastyleminor{\small\normalfont\ttfamily\slshape}%
\def\isastyleminortt{\small\normalfont\ttfamily}%
\def\isastylescript{\footnotesize\normalfont\ttfamily\slshape}%
\isachardefaults%
}
\isabellestyledefault

\newcommand{\isabellestylett}{%
\def\isastyle{\small\normalfont\ttfamily}%
\def\isastylett{\small\normalfont\ttfamily}%
\def\isastyleminor{\small\normalfont\ttfamily}%
\def\isastyleminortt{\small\normalfont\ttfamily}%
\def\isastylescript{\footnotesize\normalfont\ttfamily}%
\isachardefaults%
}

\newcommand{\isabellestyleit}{%
\def\isastyle{\small\normalfont\itshape}%
\def\isastylett{\small\normalfont\ttfamily}%
\def\isastyleminor{\normalfont\itshape}%
\def\isastyleminortt{\normalfont\ttfamily}%
\def\isastylescript{\footnotesize\normalfont\itshape}%
\isachardefaults%
\def\isacharunderscorekeyword{\mbox{-}}%
\def\isacharbang{\isamath{!}}%
\def\isachardoublequote{}%
\def\isachardoublequoteopen{}%
\def\isachardoublequoteclose{}%
\def\isacharhash{\isamath{\#}}%
\def\isachardollar{\isamath{\$}}%
\def\isacharpercent{\isamath{\%}}%
\def\isacharampersand{\isamath{\&}}%
\def\isacharprime{\isamath{\mskip2mu{'}\mskip-2mu}}%
\def\isacharparenleft{\isamath{(}}%
\def\isacharparenright{\isamath{)}}%
\def\isacharasterisk{\isamath{*}}%
\def\isacharplus{\isamath{+}}%
\def\isacharcomma{\isamath{\mathord,}}%
\def\isacharminus{\isamath{-}}%
\def\isachardot{\isamath{\mathord.}}%
\def\isacharslash{\isamath{/}}%
\def\isacharcolon{\isamath{\mathord:}}%
\def\isacharsemicolon{\isamath{\mathord;}}%
\def\isacharless{\isamath{<}}%
\def\isacharequal{\isamath{=}}%
\def\isachargreater{\isamath{>}}%
\def\isacharat{\isamath{@}}%
\def\isacharbrackleft{\isamath{[}}%
\def\isacharbackslash{\isamath{\backslash}}%
\def\isacharbrackright{\isamath{]}}%
\def\isacharunderscore{\mbox{-}}%
\def\isacharbraceleft{\isamath{\{}}%
\def\isacharbar{\isamath{\mid}}%
\def\isacharbraceright{\isamath{\}}}%
\def\isachartilde{\isamath{{}\sp{\sim}}}%
\def\isacharbackquoteopen{\isatext{\guilsinglleft}}%
\def\isacharbackquoteclose{\isatext{\guilsinglright}}%
}

\newcommand{\isabellestyleliteral}{%
\isabellestyleit%
\def\isacharunderscore{\_}%
\def\isacharunderscorekeyword{\_}%
\chardef\isacharbackquoteopen=`\`%
\chardef\isacharbackquoteclose=`\`%
}

\newcommand{\isabellestyleliteralunderscore}{%
\isabellestyleliteral%
\def\isacharunderscore{\textunderscore}%
\def\isacharunderscorekeyword{\textunderscore}%
}

\newcommand{\isabellestylesl}{%
\isabellestyleit%
\def\isastyle{\small\normalfont\slshape}%
\def\isastylett{\small\normalfont\ttfamily}%
\def\isastyleminor{\normalfont\slshape}%
\def\isastyleminortt{\normalfont\ttfamily}%
\def\isastylescript{\footnotesize\normalfont\slshape}%
}


% cancel text

\usepackage[normalem]{ulem}
\newcommand{\isamarkupcancel}[1]{\isa{\xout{#1}}}


% tagged regions

%plain TeX version of comment package -- much faster!
\let\isafmtname\fmtname\def\fmtname{plain}
\usepackage{comment}
\let\fmtname\isafmtname

\newcommand{\isafold}[1]{\emph{$\langle\mathord{\mathit{#1}}\rangle$}}

\newcommand{\isakeeptag}[1]%
{\includecomment{isadelim#1}\includecomment{isatag#1}\csarg\def{isafold#1}{}}
\newcommand{\isadroptag}[1]%
{\excludecomment{isadelim#1}\excludecomment{isatag#1}\csarg\def{isafold#1}{}}
\newcommand{\isafoldtag}[1]%
{\includecomment{isadelim#1}\excludecomment{isatag#1}\csarg\def{isafold#1}{\isafold{#1}}}

\isakeeptag{document}
\isakeeptag{theory}
\isakeeptag{proof}
\isakeeptag{ML}
\isakeeptag{visible}
\isadroptag{invisible}
\isakeeptag{important}
\isakeeptag{unimportant}

\IfFileExists{isabelletags.sty}{\usepackage{isabelletags}}{}