Abstract
The \(S_2\)–\(S_p\) minimization over the positive semidefinite cone is the semidefinite least squares problem with Schatten \(p\)-quasi (\(0<p<1\)) norm regularization term. It has wide applications in many areas including compressed sensing, control, statistics, signal and image processing, etc. In this paper, by developing the symmetric matrix \(\mathrm {p}\)-thresholding operator representation theory, we establish the necessary condition for global optimal solutions of \(S_2\)–\(S_p\) minimization, and also provide the exact lower bound for the positive eigenvalues at global optimal solutions.
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Acknowledgments
The work was supported in part by the National Basic Research Program of China (2010CB732501), the National Natural Science Foundation of China (71271021, 11171018), the Fundamental Research Funds for the Central Universities of China (2012YJS118).
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Chen, Y., Xiu, N. & Peng, D. Global solutions of non-Lipschitz \(S_{2}\)–\(S_{p}\) minimization over the positive semidefinite cone. Optim Lett 8, 2053–2064 (2014). https://doi.org/10.1007/s11590-013-0701-y
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DOI: https://doi.org/10.1007/s11590-013-0701-y