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- The matrix P-1 A P is the new matrix A' after a basis
transformation described by a transformation matrix P.
- To get A' diagonal, we want to take the new basis to be the
eigenvectors
and
of A.
- A transformation matrix consists of the new basis vectors
expressed in terms of the old basis, so:
![](img20.gif)
Check:
![](img21.gif)
![](img22.gif)
Next: 9.47(c), §1 Asked
Up: 9.47
Previous: 9.47(b), §1 Asked