,ON THE GENERALIZED DETERIORATED POSITIVE SEMI-DEFINITE AND SKEW-HERMITIAN SPLITTING PRECONDITIONER

• 作 者: Davod Hezari Vahid Edalatpour Hadi Feyzollahzadeh Davod Khojasteh Salkuyeh
• 机 构: Faculty of Mathematical Sciences, University of Guilan, Rasht, Iran“,”Department of Mathematical and
• 出 处: 计算数学（英文版）
• 发表日期: 2019年1期
• 关键词: Saddle point problem Preconditioner Nonsymmetric Symmetric Positive definite Kry

For nonsymmetric saddle point problems,Huang et al.in [Numer.Algor.75 (2017),pp.1161-1191] established a generalized variant of the deteriorated positive semi-definite and skew-Hermitian splitting (GVDPSS) preconditioner to expedite the convergence speed of the Krylov subspace iteration methods like the GMRES method.In this paper,some new convergence properties as well as some new numerical results are presented to validate the theoretical results.