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[Untitled]

Authors :
Lisette G de Pillis
Henk A. van der Vorst
Tony F. Chan
Source :
Numerical Algorithms. 17:51-66
Publication Year :
1998
Publisher :
Springer Science and Business Media LLC, 1998.

Abstract

We present a transpose-free version of the nonsymmetric scaled Lanczos procedure. It generates the same tridiagonal matrix as the classical algorithm, using two matrix–vector products per iteration without accessing AT. We apply this algorithm to obtain a transpose-free version of the Quasi-minimal residual method of Freund and Nachtigal [15] (without look-ahead), which requires three matrix–vector products per iteration. We also present a related transpose-free version of the bi-conjugate gradients algorithm.

Details

ISSN :
10171398
Volume :
17
Database :
OpenAIRE
Journal :
Numerical Algorithms
Accession number :
edsair.doi...........9b0fa2a85cd0320828e5a42f2cc23cc1
Full Text :
https://doi.org/10.1023/a:1011637511962