کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8901450 1631736 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A class of accelerated parameterized inexact Uzawa algorithms for complex symmetric linear systems
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات کاربردی
پیش نمایش صفحه اول مقاله
A class of accelerated parameterized inexact Uzawa algorithms for complex symmetric linear systems
چکیده انگلیسی
We establish a class of accelerated parameterized inexact Uzawa (APIU) algorithms for solving the complex symmetric linear systems. Our main contribution is accelerating the convergence of the PIU algorithm by making use of the extrapolation technique which is based on the eigenvalues of the iterative matrix. These accelerated parameterized inexact Uzawa algorithms involve two iteration parameters whose special choices can recover the parameterized inexact Uzawa algorithm and some other methods. First, the accelerated model for the PIU algorithm is established and the accelerated PIU algorithm is presented. Then we study the convergence of the corrected PIU algorithm. Moreover, we present the optimal iteration parameter and the corresponding optimal convergence factor for the PIU method. We also consider acceleration of the PIU iteraton by Krylov subspace methods. Numerical experiments are presented to illustrate the theoretical results and examine the numerical effectiveness of the new method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Mathematics and Computation - Volume 320, 1 March 2018, Pages 547-556
نویسندگان
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