Structured backward error analysis for generalized saddle point problems
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DOI: 10.1007/s10444-020-09787-x
Abstract: Recently, the structured backward errors for the generalized saddle point problems with some different structures have been studied by some authors, but their results involve some Kronecker products, the vec-permutation matrices, and the orthogonal projection… read more here.
Keywords: backward errors; saddle point; structured backward; point problems ... See more keywords
A class of modified DPSS preconditioners for generalized saddle-point linear systems
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DOI: 10.1007/s40314-019-0844-2
Abstract: In this paper, a class of new preconditioners based on matrix splitting are presented for generalized saddle-point linear systems, which improve some recently published preconditioners in view of spectral distributions and numerical performances. Moreover, we… read more here.
Keywords: generalized saddle; point linear; linear systems; class ... See more keywords
Semiconvergence of the extended PSS method for singular generalized saddle point problems
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DOI: 10.1080/00207160.2021.1938010
Abstract: Recently, an extension of the positive definite and skew-Hermitian splitting (EPSS) iteration method for nonsingular generalized saddle point problems has been stated by Masoudi and Salkuyeh. In this article, we study the semiconvergence of the… read more here.
Keywords: saddle point; singular generalized; method; generalized saddle ... See more keywords