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• W2952048346 abstract "This work proposes block-coordinate fixed point algorithms with applications to nonlinear analysis and optimization in Hilbert spaces. The asymptotic analysis relies on a notion of stochastic quasi-Fej'er monotonicity, which is thoroughly investigated. The iterative methods under consideration feature random sweeping rules to select arbitrarily the blocks of variables that are activated over the course of the iterations and they allow for stochastic errors in the evaluation of the operators. Algorithms using quasinonexpansive operators or compositions of averaged nonexpansive operators are constructed, and weak and strong convergence results are established for the sequences they generate. As a by-product, novel block-coordinate operator splitting methods are obtained for solving structured monotone inclusion and convex minimization problems. In particular, the proposed framework leads to random block-coordinate versions of the Douglas-Rachford and forward-backward algorithms and of some of their variants. In the standard case of $m=1$ block, our results remain new as they incorporate stochastic perturbations." @default.
• W2952048346 created "2019-06-27" @default.
• W2952048346 creator A5062845079 @default.
• W2952048346 creator A5070449222 @default.
• W2952048346 date "2014-04-29" @default.
• W2952048346 modified "2023-10-15" @default.
• W2952048346 title "Stochastic Quasi-Fej'er Block-Coordinate Fixed Point Iterations with Random Sweeping" @default.
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• W2952048346 hasPublicationYear "2014" @default.
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