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diff --git a/buch/papers/fresnel/pfad.tex b/buch/papers/fresnel/pfad.tex
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--- a/buch/papers/fresnel/pfad.tex
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-%
-% pfad.tex -- template for standalon tikz images
-%
-% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
-%
-\documentclass[tikz]{standalone}
-\usepackage{amsmath}
-\usepackage{times}
-\usepackage{txfonts}
-\usepackage{pgfplots}
-\usepackage{csvsimple}
-\usetikzlibrary{arrows,intersections,math}
-\begin{document}
-\def\skala{1}
-\definecolor{darkgreen}{rgb}{0,0.6,0}
-\begin{tikzpicture}[>=latex,thick,scale=\skala]
-
-\draw[->] (-1,0) -- (9,0) coordinate[label={$\operatorname{Re}$}];
-\draw[->] (0,-1) -- (0,6) coordinate[label={left:$\operatorname{Im}$}];
-
-\draw[->,color=red,line width=1.4pt] (0,0) -- (7,0);
-\draw[->,color=blue,line width=1.4pt] (7,0) arc (0:45:7);
-\draw[->,color=darkgreen,line width=1.4pt] (45:7) -- (0,0);
-
-\node[color=red] at (3.5,0) [below] {$\gamma_1(t) = tR$};
-\node[color=blue] at (25:7) [right] {$\gamma_2(t) = Re^{it}$};
-\node[color=darkgreen] at (45:3.5) [above left] {$\gamma_3(t) = te^{i\pi/4}$};
-
-\node at (7,0) [below] {$R$};
-\node at (45:7) [above] {$Re^{i\pi/4}$};
-
-\end{tikzpicture}
-\end{document}
-