SIAM Journal on Numerical Analysis, Vol. 21, No. 2 (Apr., 1984), pp. 352-362 (11 pages) We characterize the class CG(s) of matrices A for which the linear system Ax = b can be solved by an s-term ...
Recently, M. Hanke and M. Neumannt have derived a necessary and sufficient condition on a splitting of A = U—V, which leads to a fixed point system, such that the iterative sequence converges to the ...