http://dl.dropbox.com/u/33103477/prune.png [Broken](adsbygoogle = window.adsbygoogle || []).push({});

I am unsure if the the answer is:

[tex] {\begin{pmatrix}

2 & 1 \\

5 & 1

\end{pmatrix}},

{\begin{pmatrix}

3 & -1 \\

7 & 4

\end{pmatrix}} [/tex]

or

[tex] {\begin{pmatrix}

2 & 1 \\

5 & 1

\end{pmatrix}},

{\begin{pmatrix}

3 & -1 \\

7 & 4

\end{pmatrix}},

{\begin{pmatrix}

2 & 7 \\

-4 & 1

\end{pmatrix}} [/tex]

I'm pretty sure it's the second one but am a bit confused about when the algorithm stops.

Can someone confirm the answer ?

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# Homework Help: Pruning a set of matrices (easy)

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