For $n\times n$ matrix A, if $\|A\|_\infty=O(1/n)$, can I deduce $\|A^{-1}\|_\infty=O(n)$? Here, $\|A\|_{\infty}=\max _{1 \leq i \leq n} \sum_{j=1}^{n}\left|a_{i j}\right|$.
2026-03-27 19:33:42.1774640022
Is the order of convergence of $\|A\|_\infty$ and the order of $\|A^{-1}\|_\infty$ reciprocal?
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