Flexible incomplete Cholesky factorization with multi‐parameters to control the number of nonzero elements in preconditioners
Copyright policy )Flexible incomplete Cholesky factorization with multi‐parameters to control the number of nonzero elements in preconditioners
SUMMARYAn incomplete Cholesky (IC) factorization with multi‐parameters is presented. The marked virtue of the proposed IC factorization algorithm is to dynamically control the number of nonzero elements in each column of the IC factorization preconditioner L with the help of these involved parameters. Parameter setting strategies are also given. Numerical results show that the total computing time for both computation of the preconditioner L and iterative solution is evidently reduced for almost all test matrices. In general, these parameters can obviously enhance the effectiveness and performance of the IC factorization. Copyright © 2011 John Wiley & Sons, Ltd.
- University of Electronic Science and Technology of China China (People's Republic of)
preconditioner sparsity, Iterative numerical methods for linear systems, symmetric matrix, conjugate gradient method, fill-in, Preconditioners for iterative methods, numerical results, incomplete Cholesky factorization
preconditioner sparsity, Iterative numerical methods for linear systems, symmetric matrix, conjugate gradient method, fill-in, Preconditioners for iterative methods, numerical results, incomplete Cholesky factorization
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