Iterative refinement implies numerical stability
Iterative refinement implies numerical stability
复制标题
DOI:
10.1007/bf01932150
复制
发表时间:
1977-09
影响因子:
1.5
通讯作者:
M. Jankowski;H. Wozniakowski
中科院分区:
文献类型:
--
作者:
M. Jankowski;H. Wozniakowski
Suppose that a method ϕ computes an approximation of the exact solution of a linear systemAx=bwith the relative errorq,q<1. We prove that if all computations are performed in floating point arithmeticfland single precision, then ϕ with iterative refinement is numerically stable and well-behaved wheneverq∥A∥ ∥A−1∥ is at most of order unity.