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Bregman Circumcenters: Monotonicity and Forward Weak Convergence - MaRDI portal

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Bregman Circumcenters: Monotonicity and Forward Weak Convergence

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Publication:6366936

DOI10.1007/S11590-022-01881-XarXiv2105.02308MaRDI QIDQ6366936

Author name not available (Why is that?)

Publication date: 5 May 2021

Abstract: Recently, we systematically studied the basic theory of Bregman circumcenters in another paper. In this work, we aim to apply Bregman circumcenters to optimization algorithms. Here, we propose the forward Bregman monotonicity which is a generalization of the powerful Fej'er monotonicity and show a weak convergence result of the forward Bregman monotone sequence. We also naturally introduce the Bregman circumcenter mappings associated with a finite set of operators. Then we provide sufficient conditions for the sequence of iterations of the forward Bregman circumcenter mapping to be forward Bregman monotone. Furthermore, we prove that the sequence of iterations of the forward Bregman circumcenter mapping weakly converges to a point in the intersection of the fixed point sets of relevant operators, which reduces to the known weak convergence result of the circumcentered method under the Euclidean distance. In addition, particular examples are provided to illustrate the Bregman isometry and Browder's demiclosedness principle, and our convergence result.





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