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JOURNALS // Sibirskii Zhurnal Vychislitel'noi Matematiki // Archive

Sib. Zh. Vychisl. Mat., 2020 Volume 23, Number 3, Pages 315–324 (Mi sjvm750)

Orthogonal projectors and systems of linear algebraic equations

I. V. Kireev

Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/44, Krasnoyarsk, 660036 Russia

Abstract: In this paper, an operator iterative procedure for constructing of the orthogonal projection of a vector on a given subspace is proposed. The algorithm is based on the Euclidean ortogonalization of power sequences of a special linear transformation generated by the original subspace. For consistent systems of linear algebraic equations, a numerical method based on this idea is proposed. Numerical results are presented.

Key words: numerical methods, linear algebra, orthogonal projectors, Kaczmarz method, Krylov subspaces.

UDC: 519.6

Received: 19.02.2019
Revised: 31.01.2020
Accepted: 16.04.2020

DOI: 10.15372/SJNM20200306


 English version:
Numerical Analysis and Applications, 2020, 13:3, 262–270

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© Steklov Math. Inst. of RAS, 2024