Abstract
The NP-hard absolute value equation (AVE) Ax − |x| = b where \(A\in R^{n\times n}\) and \(b\in R^n\) is solved by a succession of linear programs. The linear programs arise from a reformulation of the AVE as the minimization of a piecewise-linear concave function on a polyhedral set and solving the latter by successive linearization. A simple MATLAB implementation of the successive linearization algorithm solved 100 consecutively generated 1,000-dimensional random instances of the AVE with only five violated equations out of a total of 100,000 equations.
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Mangasarian, O.L. Absolute value equation solution via concave minimization. Optimization Letters 1, 3–8 (2007). https://doi.org/10.1007/s11590-006-0005-6
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DOI: https://doi.org/10.1007/s11590-006-0005-6