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user293017
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Jordan decomposition of a block matrix
Apr 8, 2019
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Eigenvalues of $\sum_i A_i P_i$ with $(A_i)_{jk}=\delta_{ij}\delta_{ik}$ and $P_i$ orthogonal projections
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What is the spectral radius of $PBD$ with $P$ projection, $\|B\|_\infty=1$, and $D$ diagonal with $\|D\|_2<1$?