Package Name QMRPACK
Author(s) R. Freund and N. Nachtigal
Version no version info available
Date 1996
Language Fortran 77
Platform(s) any
References 7.8 Lanczos Method
7.11 Lanczos Method for Complex Symmetrix Eigenproblems
Functionality The quasi-minimal residual (QMR) algorithm is a Krylov-subspace method for the iterative solution of large non-Hermitian linear systems. QMR is based on the look-ahead Lanczos algorithm that, by itself, can also be used to obtain approximate eigenvalues of large non-Hermitian matrices. QMRPACK is a software package with FORTRAN77 implementations of the QMR algorithm and variants thereof, and of the three-term and coupled two-term look-ahead Lanczos algorithms.
Location code: http://www.netlib.org/linalg/qmr
documentation: QMRPACK web site
ACM Transactions on Mathematical Software, Vol. 22, no. 1, p. 46-77, 1996

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