Module QZVAL in SEISPACK

• SEISPACK Information

• Components
  • Fullsource from NETLIB
  • Source from NETLIB

QZVAL

 
The third step of the QZ algorithm for generalized eigenproblems. Accepts a pair
of real matrices, one in quasi-triangular form and the other in upper triangular
form and computes the eigenvalues of the associated eigenproblem. Usually
preceded by QZHES, QZIT, and followed by QZVEC.
 
Classes  :  D4c2c . Compute eigenvalues of matrices in other compact forms
 
Type     : Fortran subroutine in SEISPACK package.
Access   : Public domain. Portable.
Precision: Single.
Note     : Implementations vary among sites.
 
Usage    : CALL QZVAL(NM, N, A, B, ALFR, ALFI, BETA, MATZ, Z)
 
See also : QZHES QZIT QZVEC
 
Details  : Fullsource Source
Sites    : (1) ARNO (2) NETLIB
 

Implementation of QZVAL from SEISPACK on ARNO

 
ARNO:      Silicon Graphics Origin 2000, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Single.
 
Those logged in to arno.nist.gov or amur.nist.gov may access this module as
follows.
 
   Access       : f77 -o prog prog.f -lcomplib.sgimath (Note: prepend s to
                  routine name in call)
   Documentation: man sqzval
 

Implementation of QZVAL from SEISPACK on NETLIB

 
NETLIB:    Public access repository, The University of Tennessee at
           Knoxville and Bell Laboratories
 
Precision: Single.
Note     : Double precision version available in NETLIB package EISPACK.
 
You may access components from NETLIB outside GAMS as follows.
 
   Source       : echo "send only qzval from seispack" | mail netlib@ornl.gov
   Fullsource   : echo "send qzval from seispack" | mail netlib@ornl.gov