Module RATQR in CMLIB

• CMLIB Information

• Components
  • Documentation from ITL
  • Fullsource from ITL
  • Source from ITL

RATQR

 
Computes largest or smallest eigenvalues of symmetric tridiagonal matrix using
rational QR method with Newton correction.
 
Classes  :  D4a5 .  Tridiagonal matrix eigenvalue problems
            D4c2a . Compute eigenvalues of tridiagonal matrix
 
Type     : Fortran subroutine in CMLIB library (EISPACK sublibrary).
Access   : Public domain. Portable.
Precision: Single.
 
Usage    : CALL RATQR(N,EPS1,D,E,E2,M,W,IND,BD,TYPE,IDEF,IERR)
 
Details  : Documentation Fullsource Source
Sites    : (1) ARNO (2) ITL
 

Implementation of RATQR from CMLIB 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.
 
   Link         : See cmlib man page.
   Documentation: cmdoc ratqr
   Source       : cmsrc ratqr
   Fullsource   : cmsrcx ratqr
 

Implementation of RATQR from CMLIB on ITL

 
ITL:       Unix Workstation Network, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Single.
 
Access available only to NIST staff on internal Unix systems. They may access this
package provided the /itl tree is cross-mounted.
 
   Link         : f77 -o main main.f -lcm
   Documentation: cmdoc ratqr
   Source       : cmsrc RATQR
   Fullsource   : cmsrcx ratqr