Module LANZ in LANZ

• LANZ Information

• Components
  • Documentation from NETLIB
  • Source-1 from NETLIB
  • Source-2 from NETLIB

LANZ

 
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
 

Implementation of LANZ from LANZ on 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