Screening Rules and its Complexity for Active Set Identification

• URL: http://arxiv.org/abs/2009.02709v1
• Date: Sun, 6 Sep 2020 11:10:34 GMT
• Title: Screening Rules and its Complexity for Active Set Identification
• Authors: Eugene Ndiaye and Olivier Fercoq and Joseph Salmon
• Abstract summary: We show that screening rules stem from a combination of natural properties of subdifferential sets and optimality conditions. Under mild assumptions, we analyze the number of iterations needed to identify the optimal active set for any converging algorithm.
• Score: 16.762870396299334
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Screening rules were recently introduced as a technique for explicitly identifying active structures such as sparsity, in optimization problem arising in machine learning. This has led to new methods of acceleration based on a substantial dimension reduction. We show that screening rules stem from a combination of natural properties of subdifferential sets and optimality conditions, and can hence be understood in a unified way. Under mild assumptions, we analyze the number of iterations needed to identify the optimal active set for any converging algorithm. We show that it only depends on its convergence rate.

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