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\title{General Mathematics and ACM II}
\author{Exercise 1}
\date{February 4, 2011}
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\begin{enumerate}

\item Ivanov, p.\ 87, Problem 5.

\item Write out a complete proof for Ivanov, p.\ 89, Theorem 2.

\item Write out the proof that (3) implies (4) in Ivanov, p.\ 90,
Theorem 3.

\end{enumerate}
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