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% http://golatex.de/viewtopic,p,91339.html
\documentclass[a4paper]{article}
\usepackage[ngerman]{babel}
\usepackage{xsim,tcolorbox}
\usepackage{amsmath}
\xsimsetup{
exercise/within = section ,
exercise/the-counter = \thesection.\arabic{exercise} ,
print-solutions/headings-template=none
}
\SetExerciseParameters{exercise}{
exercise-template = mine ,
solution-template = mine
}
\DeclareExerciseEnvironmentTemplate{mine}
{%
\tcolorbox[
% colors:
colback = white , colframe = black , coltitle = black ,
% rules:
boxrule = 0pt , toprule = 1pt , bottomrule = 1pt , arc = 0pt ,
% spacing:
boxsep = 0pt , left = 0pt , right = 0pt ,
% title:
detach title , before upper = \tcbtitle\par\noindent ,
fonttitle = \bfseries ,
title = \XSIMmixedcase{\GetExerciseName}~\GetExerciseProperty{counter}
]
}
{\endtcolorbox}
\DeclareExerciseTranslation{German}{exercise}{Aufgabe}
\DeclareExerciseTagging{difficulty}
\begin{document}
\section{Wellenausbreitung im Vakuum und in Materie}
\subsection{Maxwellsche Gleichungen}
\begin{align*}
\nabla \cdot \vec{E}\left(\vec{r}, t \right) =
\frac{\varrho\left(\vec{r}, t \right)}{\varepsilon_0}
\end{align*}
\begin{exercise}[difficulty=easy]
Something stupid
\end{exercise}
\begin{solution}
Here is a nonstupid solution for your problem
\end{solution}
\subsection{Empirischer Zugang zu Wellengleichungen}
\begin{exercise}[difficulty=hard]
Eine weitere Aufgabe
\end{exercise}
\begin{solution}
Solution Number 2
\end{solution}
\subsection*{Lösungen}
\printsolutions[section,difficulty=hard]
\section{Wellenausbreitung im Vakuum und in Materie}
\subsection{Maxwellsche Gleichungen}
\begin{align*}
\nabla \cdot \vec{E}\left(\vec{r}, t \right) =
\frac{\varrho\left(\vec{r}, t \right)}{\varepsilon_0}
\end{align*}
\begin{exercise}[difficulty=easy]
Something stupid
\end{exercise}
\begin{solution}
Here is a nonstupid solution for your problem
\end{solution}
\subsection{Empirischer Zugang zu Wellengleichungen}
\begin{exercise}[difficulty=hard]
Eine weitere Aufgabe
\end{exercise}
\begin{solution}
Solution Number 2
\end{solution}
\subsection*{Lösungen}
\printsolutions[section]
\end{document}
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