Upper bound of spectral radius of the sum of two matrices, one with spectral radius no larger than 1, and the other has small eigenvalues

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Suppose I have one $pNtimes pN$ matrix $bf A$ with spectral radius no larger than 1 (maximum of absolute values of eigenvalues is no larger than 1), and the other matrix $bf H$ is in a block-like format (empty means zero, only zeros in the top-left and bottom-right block are explicitly marked, the superscript like $N^(N+1,N)$ means this number "$N$" is at the $N+1$th row and $N$th column)
My question is how to derive a reasonably tight bound of the spectral radius of the sum $bf A+H$. Again the spectral radius of $bf A$ is smaller than 1. The eigenvalue of $bf H$ is $pm frac1n + 1$, so we believe the spectral radius of $bfA+H$ should be near the spectral radius of $bf A$.
linear-algebra eigenvalues-eigenvectors
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Suppose I have one $pNtimes pN$ matrix $bf A$ with spectral radius no larger than 1 (maximum of absolute values of eigenvalues is no larger than 1), and the other matrix $bf H$ is in a block-like format (empty means zero, only zeros in the top-left and bottom-right block are explicitly marked, the superscript like $N^(N+1,N)$ means this number "$N$" is at the $N+1$th row and $N$th column)
My question is how to derive a reasonably tight bound of the spectral radius of the sum $bf A+H$. Again the spectral radius of $bf A$ is smaller than 1. The eigenvalue of $bf H$ is $pm frac1n + 1$, so we believe the spectral radius of $bfA+H$ should be near the spectral radius of $bf A$.
linear-algebra eigenvalues-eigenvectors
@user1551 Sorry the H was in wrong format and I missed the coefficient. Thanks!
– Tony
Aug 28 at 0:46
add a comment |Â
up vote
3
down vote
favorite
up vote
3
down vote
favorite
Suppose I have one $pNtimes pN$ matrix $bf A$ with spectral radius no larger than 1 (maximum of absolute values of eigenvalues is no larger than 1), and the other matrix $bf H$ is in a block-like format (empty means zero, only zeros in the top-left and bottom-right block are explicitly marked, the superscript like $N^(N+1,N)$ means this number "$N$" is at the $N+1$th row and $N$th column)
My question is how to derive a reasonably tight bound of the spectral radius of the sum $bf A+H$. Again the spectral radius of $bf A$ is smaller than 1. The eigenvalue of $bf H$ is $pm frac1n + 1$, so we believe the spectral radius of $bfA+H$ should be near the spectral radius of $bf A$.
linear-algebra eigenvalues-eigenvectors
Suppose I have one $pNtimes pN$ matrix $bf A$ with spectral radius no larger than 1 (maximum of absolute values of eigenvalues is no larger than 1), and the other matrix $bf H$ is in a block-like format (empty means zero, only zeros in the top-left and bottom-right block are explicitly marked, the superscript like $N^(N+1,N)$ means this number "$N$" is at the $N+1$th row and $N$th column)
My question is how to derive a reasonably tight bound of the spectral radius of the sum $bf A+H$. Again the spectral radius of $bf A$ is smaller than 1. The eigenvalue of $bf H$ is $pm frac1n + 1$, so we believe the spectral radius of $bfA+H$ should be near the spectral radius of $bf A$.
linear-algebra eigenvalues-eigenvectors
edited Aug 28 at 1:31
asked Aug 27 at 18:06
Tony
2,1491626
2,1491626
@user1551 Sorry the H was in wrong format and I missed the coefficient. Thanks!
– Tony
Aug 28 at 0:46
add a comment |Â
@user1551 Sorry the H was in wrong format and I missed the coefficient. Thanks!
– Tony
Aug 28 at 0:46
@user1551 Sorry the H was in wrong format and I missed the coefficient. Thanks!
– Tony
Aug 28 at 0:46
@user1551 Sorry the H was in wrong format and I missed the coefficient. Thanks!
– Tony
Aug 28 at 0:46
add a comment |Â
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@user1551 Sorry the H was in wrong format and I missed the coefficient. Thanks!
– Tony
Aug 28 at 0:46