Diagonal and circulant or skew-circulant splitting preconditioners for spatial fractional diffusion equations
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DOI: 10.1007/s40314-017-0570-6
Abstract: We propose three new preconditioners: diagonal and optimal-circulant splitting preconditioner, diagonal and skew-circulant splitting preconditioner, and diagonal and optimal-skew-circulant splitting preconditioner for solving the diagonal-plus-Toeplitz linear system discretized from the spatial fractional diffusion equations. Theoretical… read more here.
Keywords: diagonal circulant; splitting preconditioner; circulant; circulant splitting ... See more keywords
Block matrices and Guo's index for block circulant matrices with circulant blocks
Sign Up to like & getrecommendations! Published in 2018 at "Linear Algebra and its Applications"
DOI: 10.1016/j.laa.2018.07.015
Abstract: In this paper we deal with circulant and partitioned into $n$-by-$n$ circulant blocks matrices and introduce spectral results concerning this class of matrices. The problem of finding lists of complex numbers corresponding to a set… read more here.
Keywords: circulant blocks; guo index; index block; circulant ... See more keywords