Let, $\mathbf{A}$ and $\mathbf{B}$ be $n \times n$ matricies. When is it true that, $$||\mathbf{A}\mathbf{B}||_{\infty} = ||\mathbf{A}||_{\infty}||\mathbf{B}||_{\infty}? $$
Or is it always true? Thanks.
2026-03-28 06:22:48.1774678968
Sub multiplicative property of infinity norm is equality
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