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• W1878503463 abstract "In recent years, the l1,p-regularizer has been widely used to induce structured sparsity in the solutions to various optimization problems. Currently, such l1,p-regularized problems are typically solved by first-order methods. Motivated by the desire to analyze the convergence rates of these methods, we show that for a large class of l1,p-regularized problems, an error bound condition is satisfied when p e 2 [1, 2] or p = ∞ but fails to hold for any p e (2, ∞). Based on this result, we show that many first-order methods enjoy an asymptotic linear rate of convergence when applied to l1,p-regularized linear or logistic regression with p e [1, 2] or p = ∞. By contrast, numerical experiments suggest that for the same class of problems with p e (2, ∞), the aforementioned methods may not converge linearly." @default.
• W1878503463 created "2016-06-24" @default.
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• W1878503463 date "2015-07-06" @default.
• W1878503463 modified "2023-09-24" @default.
• W1878503463 title "$ell_{1,p}$-Norm Regularization: Error Bounds and Convergence Rate Analysis of First-Order Methods" @default.
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