# Difference between revisions of "P. 245, line 8"

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Use:

${\displaystyle A_{7}=\left[{\begin{array}{cccc}2&-7&6&-7\\0&1&0&-7\\0&-7&8&-7\\0&0&0&8\end{array}}\right]}$


instead. This matrix has repeated eigenvalues, but a linearly independent set of 4 eigenvectors.