Abstract
In this note, we give the two counterexamples for two unique solvability conditions that appeared in the published paper by Wu et al. (J Optim Theory Appl 169:705–712, 2016).
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Notes
For \(x \in {\mathbb {R}}^{n}\) sign(x) denotes a vector with components equal to \(-1\), 0 or 1 depending on whether the corresponding component of x is negative, zero or positive. The diagonal matrix D = diag(sign(x)) denotes a diagonal matrix corresponding to sign(x).
References
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Mangasarian, O.L., Meyer, R.R.: Absolute value equations. Linear Algebra Appl. 419, 359–367 (2006)
Wu, S.L., Guo, P.: On the unique solvability of the absolute value equation. J. Optim. Theory Appl. 169, 705–712 (2016)
Acknowledgements
The research work of Shubham Kumar was supported by the Ministry of Education, Government of India, through Graduate Aptitude Test in Engineering (GATE) fellowship registration No. MA19S43033021.
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Kumar, S. Correction to: On the Unique Solvability of the Absolute Value Equation. J Optim Theory Appl 200, 891–893 (2024). https://doi.org/10.1007/s10957-023-02357-3
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DOI: https://doi.org/10.1007/s10957-023-02357-3