On Unique Solvability of the Absolute Value Equation

Abstrakt

It is proved that the singular value condition $\sigma_{\max}(|B|)<\sigma_{\min}(A)$ implies unique solvability of the absolute value equation $Ax+B|x|=b$ for each right-hand side $b$.. This is a generalization of an earlier result by Mangasarian and Meyer proved for the special case of $B=-I$.

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