Takeshi Iwashita
Academic Center for Computing and Media Studies, Kyoto University

"Easy Comparison Way of Orderings for Parallel ILU Preconditioned Iterative Solver"

Abstract:
In Incomplete LU (ILU) preconditioning, orderings affect the effect of preconditioning. The author recently proposed a simple evaluation way for the ILU preconditioning effect. The evaluationindex, which has a simple relationship with the matrix norm of the remainder matrix, is easily computed without additional memory requirement. Numerical tests examines a relationship between the evaluation index and a convergence rate of the preconditioned iterative method.