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- W4377013595 abstract "In this paper, we consider a class of nonsmooth sum-of-ratios fractional optimization problems with block structure. This model class is ubiquitous and encompasses several important nonsmooth optimization problems in the literature. We first propose an inertial proximal block coordinate method for solving this class of problems by exploiting the underlying structure. The global convergence of our method is guaranteed under the Kurdyka--Lojasiewicz (KL) property and some mild assumptions. We then identify the explicit exponents of the KL property for three important structured fractional optimization problems. In particular, for the sparse generalized eigenvalue problem with either cardinality regularization or sparsity constraint, we show that the KL exponents are 1/2, and so, the proposed method exhibits linear convergence rate. Finally, we illustrate our theoretical results with both analytic and simulated numerical examples." @default.
- W4377013595 created "2023-05-19" @default.
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- W4377013595 creator A5025579166 @default.
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- W4377013595 date "2023-05-15" @default.
- W4377013595 modified "2023-10-17" @default.
- W4377013595 title "Inertial Proximal Block Coordinate Method for a Class of Nonsmooth Sum-of-Ratios Optimization Problems" @default.
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- W4377013595 doi "https://doi.org/10.1137/22m1472000" @default.
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