#LyX 1.4.3 created this file. For more info see http://www.lyx.org/
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\begin_body
\begin_layout Section
Wallis' slow road to
\begin_inset Formula $\pi$
\end_inset
\end_layout
\begin_layout Standard
Wallis' formula is an infinite product that converges (slowly) to
\begin_inset Formula $\pi$
\end_inset
:
\begin_inset Formula \begin{equation}
\pi=\prod_{i=1}^{\infty}\frac{4i^{2}}{4i^{2}-1}.\end{equation}
\end_inset
\end_layout
\begin_layout Standard
The listing\InsetSpace ~
\begin_inset LatexCommand \ref{code:wallis_pi_skel}
\end_inset
contains a skeleton with no implementation but with some plotting commands
already inserted, so that you can visualize the convergence rate of this
formula as more terms are kept.
\end_layout
\begin_layout Standard
\begin_inset ERT
status open
\begin_layout Standard
\backslash
lstinputlisting[label=code:wallis_pi_skel,caption={IGNORED}]{skel/wallis_pi_skel.
py}
\end_layout
\end_inset
\end_layout
\begin_layout Standard
After running the script successfully, you should obtain a plot similar
to Figure\InsetSpace ~
\begin_inset LatexCommand \ref{fig:wallis_pi}
\end_inset
.
\end_layout
\begin_layout Standard
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status open
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\begin_inset Graphics
filename fig/wallis_pi_convergence.eps
width 4in
\end_inset
\end_layout
\begin_layout Caption
\begin_inset LatexCommand \label{fig:wallis_pi}
\end_inset
Convergence rate for Wallis' infinite product approximation to
\begin_inset Formula $\pi.$
\end_inset
\end_layout
\end_inset
\end_layout
\end_body
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