Abstract
Robust IC decomposition proposed by Ajiz et al. is often used as a useful preconditioning of the CG method. It prevents breakdown during IC decomposition procedure by means of modification for diagonal entries. Moreover, we have devised Crout version of ILU decomposition for efficient solution of nonsymmetric linear systems. In this paper, we consider to restrain over-estimated compensation for diagonal entries based on the concept of Crout version of ILU decomposition for gaining efficient RIC preconditioning. Numerical experiments indicate that the proposed revised RIC decomposition works well as compared with the conventional RIC decomposition.
