Solves the generalized eigenproblem Kx=cMx, with symmetric positive definite K and positive semi-definite M. Can also solve Kx=-cMx, with indefinite M. Find all the eigenpairs in a given range or those closest to a given value. Based on the Lanczos method with spectral transformations, partial reorthogonalization, and dynamic shifting. Developed to run efficiently on a range of architectures, including vector and parallel. Classes : D4b1 . Real symmetric generalized matrix eigenvalue problems Type : Fortran subroutine in LANZ package. Access : Some uses prohibited. Portable. Precision: Double. Note : In Fortran, with machine-dependent routines in C. Documentation includes test data, output, and makefiles for installing the program on Convex, Cray Y-MP, Encore, Sun 3, or Sun 4 computers. Fullsource1 contains source code for the above-listed computers. Fullsource2 contains generic source code for other computers. The source code includes a driver program for using LANZ as a stand-alone package. Usage : CALL LANZ (LDI, INPARI, INPARR, OTHETA, OLDBJ, Y, ONUMMT, KAUX, KRP, KCP, MAUX, MRP, MCP, R1Y) Details : Documentation Source-1 Source-2 Sites : (1) NETLIB
NETLIB: Public access repository, The University of Tennessee at Knoxville and Bell Laboratories Precision: Double. Note : In Fortran, with machine-dependent routines in C. Documentation includes test data, output, and makefiles for installing the program on Convex, Cray Y-MP, Encore, Sun 3, or Sun 4 computers. Fullsource1 contains source code for the above-listed computers. Fullsource2 contains generic source code for other computers. The source code includes a driver program for using LANZ as a stand-alone package. You may access components from NETLIB outside GAMS as follows. Source-1 : Anonymous FTP from ftp.netlib.org in lanz/lanz_file2.tgz Source-2 : echo 'send lanz_file3 lanz_file4 from LANZ' | mail netlib@ornl.gov Documentation: Anonymous FTP from ftp.netlib.org in lanz/lanz_file1.tgz
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