QMRPACK user`s guide

Technical Report · Sat Oct 01 00:00:00 EDT 1994

DOI:https://doi.org/10.2172/10191010· OSTI ID:10191010

Freund, R W ^[1]; Nachtigal, N M; Reeb, J C ^[2]

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1. AT&T Bell Labs., Murray Hill, NJ (United States)
2. Oak Ridge National Lab., TN (United States)

QMRPACK is a library of FORTRAN 77 subroutines that may be used to solve linear systems of equations with the quasi-minimal residual (QMR) method and to compute eigenvalue approximations. This User`s Guide is designed to be an overview of the codes contained in QMRPACK. Installation information is provided, and the example matrix format is discussed. The relative merits of each algorithm, as well as usage criterion are described. The authors also provide instructions for making the test drivers, as well as test output from several machines.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Aeronautics and Space Administration, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10191010
• Report Number(s): ORNL/TM-12807; ON: DE95001770; TRN: 94:009728
• Resource Relation: Other Information: PBD: Oct 1994
• Country of Publication: United States
• Language: English

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