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\title{General Mathematics and Computational Science II}
\author{Exercise 9}
\date{March 8, 2007}
\maketitle

Draw an ornament each to illustrate the seven cases of symmetry groups
listed in Ivanov, p.\ 41/42.  (We have discussed cases 1--5 in class,
6--7 are not very much different.)

Make sure that your example has \emph{only} the symmetries of the
given group.  E.g., an example for case 2 shall not be considered a
valid example for case 1 because it has additional symmetries.

The examples shall be combined into individually graded questions as
follows:

\begin{enumerate}

\item Cases 1--4

\item Cases 5, 7

\item Case 6

\end{enumerate}
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