A circulant-matrix-based new accelerated GSOR preconditioned method for block two-by-two linear systems from image restoration problems
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DOI: 10.1016/j.apnum.2021.01.005
Abstract: Abstract In this paper, we construct a circulant-matrix-based new accelerated GSOR (CNAGSOR) iteration method for a class of large and sparse block two-by-two linear systems of generalized saddle-point structure. Theoretical results about the convergence properties… read more here.
Keywords: new accelerated; matrix based; circulant matrix; block two ... See more keywords