Two-stage convex relaxation approach to low-rank and sparsity regularized least squares loss

Le Han () and Shujun Bi ()
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Le Han: South China University of Technology
Shujun Bi: South China University of Technology

Journal of Global Optimization, 2018, vol. 70, issue 1, No 5, 97 pages

Abstract: Abstract In this paper we consider the rank and zero norm regularized least squares loss minimization problem with a spectral norm ball constraint. For this class of NP-hard optimization problems, we propose a two-stage convex relaxation approach by majorizing some suitable locally Lipschitz continuous surrogates. Furthermore, the Frobenius norm error bound for the optimal solution of each stage is characterized and the theoretical guarantee is established for the two-stage convex relaxation approach by showing that the error bound of the first stage convex relaxation (i.e., the nuclear norm and $$\ell _1$$ ℓ 1 -norm regularized minimization problem), can be reduced much by the second stage convex relaxation under a suitable restricted eigenvalue condition. Also, we verify the efficiency of the proposed approach by applying it to some random test problems and some real problems.

Keywords: Low-rank and sparsity; Locally Lipschitz surrogates; Convex relaxation; 90C25; 90C27 (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1007/s10898-017-0573-2

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