A FAST BLOCK alpha-CIRCULANT PRECONDITONER FOR ALL-AT-ONCE SYSTEMS FROM WAVE EQUATIONS

Liu, J; Wu, SL

Wu, SL (corresponding author), Northeast Normal Univ, Sch Math & Stat, Changchun 130024, Peoples R China.

SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS, 2020; 41 (4): 1912

Abstract

In this paper, we propose a fast block alpha-circulant preconditioner for solving the nonsymmetric linear system arising from an all-at-once implicit ......

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