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Results tagged with matrix-inverse
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user 120137
For questions about inverses and pseudoinverses of matrices.
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The inverse of sum of two positive matrices with almost orthogonal supports
I am interested to find an approximate formula for
$$A (A+B)^{-1} A\ ,$$
for two positive matrices $A$ and $B$ whose supports are almost orthogonal.
If the support of $A$ and $B$ are orthogonal the …
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