| Abstract: | This note fills a logical gap in the theory of incomplete block factorizations of the generalized SSOR type. Namely, it is
shown that using the so-called factorized sparse approximate inverses it is possible to preserve the symmetry of a given Stieltjes
or positive definite H-matrix A in its incomplete block factorization K and to insure simultaneously the convergence of the
related splitting A=K−R. Bibliography: 3 titles.
Translated fromZapiski Nauchnykh Seminarov POMI, Vol. 219, 1994, pp. 42–52.
Translated by L. Yu. Kolotilina. |
