Module SHSEQR in LAPACK

• LAPACK Information

• Components
  • Fullsource from NETLIB
  • NeededBLAS from ITL
  • Source from NETLIB

SHSEQR

 
Computes the eigenvalues and Schur factorization of a real upper Hessenberg
matrix, using the multishift QR algorithm. (Computational routine.).
 
Classes  :  D4c2b . Compute eigenvalues of Hessenberg matrix
 
Type     : Fortran subroutine in LAPACK package.
Access   : Public domain. Portable.
Precision: Single.
 
Usage    : CALL SHSEQR( JOB, COMPZ, N, ILO, IHI, H, LDH, WR, WI, Z, LDZ, WORK,
           LWORK, INFO )
 
Details  : Fullsource NeededBLAS Source
Sites    : (1) ARNO (2) ITL (3) NETLIB
 

Implementation of SHSEQR from LAPACK on ARNO

 
ARNO:      Silicon Graphics Origin 2000, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Single. (Double: DHSEQR)
 
Those logged in to arno.nist.gov or amur.nist.gov may access this module as
follows.
 
   Access       : f90 prog.f -lscs (or -lscs_mp for multiprocessor version)
   Documentation: man shseqr
 

Implementation of SHSEQR from LAPACK on ITL

 
ITL:       Unix Workstation Network, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Single. (Double: DHSEQR)
 
Access available only to NIST staff on internal Unix systems. They may access this
package provided the /itl tree is cross-mounted.
 
   Access       : f77 -o myprog myprog.f -llapack -lblas
   NeededBLAS   : Can be downloaded from netlib
 

Implementation of SHSEQR from LAPACK on NETLIB

 
NETLIB:    Public access repository, The University of Tennessee at
           Knoxville and Bell Laboratories
 
Precision: Single. (Double: DHSEQR)
 
You may access components from NETLIB outside GAMS as follows.
 
   Source       : See LAPACK Web Page
   Fullsource   : See LAPACK Web Page