@Article{JCM-17-1,
author = {Wei-Qing, Ren and Zhao, Jin-Xi},
title = {Iterative Methods with Preconditioners for Indefinite Systems},
journal = {Journal of Computational Mathematics},
year = {1999},
volume = {17},
number = {1},
pages = {89--96},
abstract = {<p style="text-align: justify;">For the sparse linear equations $Kx=b$, where $K$ arising from optimization and discretization of some PDEs is symmetric and indefinite, it is shown that the $L&nbsp;\overline{L}^T $ factorization can be used to provide an &quot;exact&quot; preconditioner for SYMMLQ and UZAWA algorithms. &quot;Inexact&quot; preconditioner derived from approximate factorization is used in the numerical experiments.</p>},
issn = {1991-7139},
doi = {https://doi.org/1999-JCM-9084},
url = {https://global-sci.com/article/85601/iterative-methods-with-preconditioners-for-indefinite-systems}
}