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Weaker assumptions for convergence of extended block Kaczmarz and Jacobi projection algorithms Cover

Weaker assumptions for convergence of extended block Kaczmarz and Jacobi projection algorithms

Open Access
|Sep 2017

Abstract

Recent developments in the field of image reconstruction have given rise to the use of projective iterative methods, such as Kaczmarz and Jacobi, when solving inconsistent linear least squares problems. In this paper we try to generalize previous results concerning extended block versions of these two algorithms. We replace the inverse operator with the Moore-Penrose pseudoinverse and try to prove convergence under weaker assumptions. In order to accomplish this task, we show that these algorithms are special cases of a general iterative process for which convergence is already established.

DOI: https://doi.org/10.1515/auom-2017-0004 | Journal eISSN: 1844-0835 | Journal ISSN: 1224-1784
Language: English
Page range: 49 - 60
Submitted on: Nov 15, 2015
Accepted on: Apr 30, 2016
Published on: Sep 21, 2017
Published by: Ovidius University of Constanta
In partnership with: Paradigm Publishing Services
Publication frequency: 3 issues per year

© 2017 Doina Carp, Ioana Pomparău, Constantin Popa, published by Ovidius University of Constanta
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.