Kunze Linear Algebra · Problem 6.5.1

Elementary Canonical Forms

Mathematics — Methods · simultaneous-diagonalization

Problem

Find an invertible real matrix PP such that P−1APP^{-1}AP and P−1BPP^{-1}BP are both diagonal, where AA and BB are the real matrices (a) A=[1202]A = \begin{bmatrix} 1 & 2 \\ 0 & 2 \end{bmatrix}, B=[3−80−1]B = \begin{bmatrix} 3 & -8 \\ 0 & -1 \end{bmatrix} (b) A=[1111]A = \begin{bmatrix} 1 & 1 \\ 1 & 1 \end{bmatrix}, B=[1aa1]B = \begin{bmatrix} 1 & a \\ a & 1 \end{bmatrix}.

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