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

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

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.