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- W2952923373 abstract "Tseng's algorithm finds a zero of the sum of a maximally monotone operator and a monotone continuous operator by evaluating the latter twice per iteration. In this paper, we modify Tseng's algorithm for finding a zero of the sum of three operators, where we add a cocoercive operator to the inclusion. Since the sum of a cocoercive and a monotone-Lipschitz operator is monotone and Lipschitz, we could use Tseng's method for solving this problem, but implementing both operators twice per iteration and without taking into advantage the cocoercivity property of one operator. Instead, in our approach, although the {continuous monotone} operator must still be evaluated twice, we exploit the cocoercivity of one operator by evaluating it only once per iteration. Moreover, when the cocoercive or {continuous-monotone} operators are zero it reduces to Tseng's or forward-backward splittings, respectively, unifying in this way both algorithms. In addition, we provide a {preconditioned} version of the proposed method including non self-adjoint linear operators in the computation of resolvents and the single-valued operators involved. This approach allows us to {also} extend previous variable metric versions of Tseng's and forward-backward methods and simplify their conditions on the underlying metrics. We also exploit the case when non self-adjoint linear operators are triangular by blocks in the primal-dual product space for solving primal-dual composite monotone inclusions, obtaining Gauss-Seidel type algorithms which generalize several primal-dual methods available in the literature. Finally we explore {applications to the obstacle problem, Empirical Risk Minimization, distributed optimization and nonlinear programming and we illustrate the performance of the method via some numerical simulations." @default.
- W2952923373 created "2019-06-27" @default.
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- W2952923373 date "2017-03-09" @default.
- W2952923373 modified "2023-10-13" @default.
- W2952923373 title "Forward-Backward-Half Forward Algorithm for Solving Monotone Inclusions" @default.
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