Abstract: | 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. |