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Results tagged with perturbation
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user 75070
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Perturbation of linear system of equations: Is the solution still non-negative?
I found a proof under the additional assumption that $(A+f(t)I)^{-1}$ is a $Z$-matrix.
It works for arbitary vectors $x$, not just the vector containing only ones.
Let me write $M \ge 0$ ($M > 0$) if …
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