\usepackage{makeidx} % allows index generation
\usepackage{graphicx} % standard LaTeX graphics tool
% when including figure files
\usepackage{multicol} % used for the two-column index
\usepackage[bottom]{footmisc}% places footnotes at page bottom
\usepackage{lmodern}
\usepackage[T1]{fontenc}
\usepackage{isabelle,isabellesym}
%\usepackage{amssymb}
\renewcommand*\descriptionlabel[1]{\hspace\labelsep \textbf{#1}\hfil}
% this should be the last package used
\usepackage{xcolor}
\definecolor{linkcolor}{rgb}{0,0,0.4}
\usepackage[colorlinks=true,linkcolor=linkcolor,citecolor=linkcolor,
filecolor=linkcolor,pagecolor=linkcolor,
urlcolor=linkcolor]{hyperref}
% urls in roman style, theory text in math-similar italics
\urlstyle{tt}
\isabellestyle{it}
\renewcommand{\isadigit}[1]{\ensuremath{#1}}
% font size
\renewcommand{\isastyle}{\isastyleminor}
% indexing
\usepackage{ifthen}
\newcommand{\indexdef}[3]%
{\ifthenelse{\equal{}{#1}}{\index{#3 (#2)|bold}}{\index{#3 (#1\ #2)|bold}}}
\renewcommand{\isamarkupsection}[1]{{\rmfamily\subsection{#1}}}
\renewcommand{\isamarkupsubsection}[1]{{\rmfamily\subsubsection{#1}}}
% isabelle in-text command font
\newcommand{\isacom}[1]{\isa{\isacommand{#1}}}
\protected\def\isacharunderscore{\raisebox{2pt}{\_\kern-1.7pt}}
\protected\def\isacharunderscorekeyword{\raisebox{2pt}{\_}}
% isabelle keyword, adapted from isabelle.sty
\renewcommand{\isakeyword}[1]
{\emph{\def\isachardot{.}\def\isacharunderscore{\isacharunderscorekeyword}%
\def\isacharbraceleft{\{}\def\isacharbraceright{\}}\textsf{\textbf{#1}}}}
% add \noindent to text blocks automatically
\renewenvironment{isamarkuptext}{\par\isastyletext\begin{isapar}\noindent}{\end{isapar}}
\renewenvironment{isamarkuptxt}{\par\isastyletext\begin{isapar}\noindent}{\end{isapar}}
\newcommand{\noquotes}[1]{{\renewcommand{\isachardoublequote}{}\renewcommand{\isachardoublequoteopen}{}\renewcommand{\isachardoublequoteclose}{}#1}}
\newcommand{\xsymbol}[1]{\texttt{\char`\\\char`<#1>}}
%index
\newcommand{\conceptnoidx}[1]{\textbf{#1}}
\newcommand{\concept}[1]{\conceptnoidx{#1}\index{#1}}
\newcommand{\conceptidx}[2]{\conceptnoidx{#1}\index{#2}}
\newcommand{\indexed}[2]{#1\index{#2@\protect#1}}
\chardef\isachardoublequote=`\"%
\chardef\isachardoublequoteopen=`\"%
\chardef\isachardoublequoteclose=`\"%
\renewcommand{\isacharbackquoteopen}{\isacharbackquote}
\renewcommand{\isacharbackquoteclose}{\isacharbackquote}
\hyphenation{Isa-belle}