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\usepackage{etoolbox}
\usepackage{amsmath,amssymb}
\usepackage[utf8]{inputenc} % this is needed for umlauts
\usepackage[ngerman]{babel} % this is needed for umlauts
\usepackage[T1]{fontenc}    % this is needed for correct output of umlauts in pdf
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\usepackage{makeidx} % for automatically generation of an index
\usepackage[bookmarks,bookmarksnumbered,hypertexnames=false,pdfpagelayout=OneColumn,colorlinks,hyperindex=false]{hyperref} % has to be after makeidx
\usepackage{enumerate}
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\usepackage{tikz}
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\newcommand{\inputTikZ}[2]{%  
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\usepackage{shortcuts}

\author{Siehe \href{https://github.com/MartinThoma/LaTeX-examples/tree/master/documents}{GitHub}}
\title{Geometrie und Topologie}
\makeindex

\hypersetup{ 
  pdfauthor   = {Siehe GitHub}, 
  pdfkeywords = {Geometrie, Topologie}, 
  pdftitle    = {Geometrie und Topologie} 
} 

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% http://tex.stackexchange.com/q/74493/5645                         %
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\makeindex

\begin{document}
\maketitle

\renewcommand{\thechapter}{\Roman{chapter}}
%\chapter{Inhaltsverzeichnis}
\addcontentsline{toc}{chapter}{Inhaltsverzeichnis}
\tableofcontents

\chapter*{Vorwort}
Dieses Skript wird/wurde im Wintersemester 2013/2014 geschrieben.
Es beinhaltet Vorlesungsnotizen von Studenten zur Vorlesung von
Prof. Dr. Herrlich.

Es darf jeder gerne Verbesserungen einbringen!
\input{Kapitel1}

\appendix

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\printindex

\end{document}