Author : Xiaoge Wang
Publisher :
ISBN 13 :
Total Pages : 218 pages
Book Rating : 4.:/5 (31 download)
Book Synopsis Incomplete Factorization Preconditioning for Linear Least Squares Problems by : Xiaoge Wang
Download or read book Incomplete Factorization Preconditioning for Linear Least Squares Problems written by Xiaoge Wang and published by . This book was released on 1993 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: When certain conditions are imposed on the sparsity pattern of the preconditioning matrix, incomplete Cholesky (IC) factorization is identical to IMGS. Therefore, a sufficient condition on the sparsity pattern for a stable IC factorization can be derived. Based on this condition, three algorithms for modifying a sparsity pattern for which IC may not succeed have been designed. These methods differ from previously proposed methods to guarantee the existence and improve the stability of the IC factorization since they do not require numerical information. Numerical experiments illustrating the capabilities of the preconditioners are also presented."