Module 506 in TOMS

• TOMS Information

• Components
  • Fullsource from NETLIB

506

 
HQR3: a Fortran subprogram which reduces an upper Hessenberg matrix to
quasi-triangular form by unitary similarity transformations to yield the
eigenvalues of the matrix in order of magnitude. HQR3 can be used with EISPACK
routines ORTHES and ORTRAN to compute the eigenvalues of a real general matrix.
(See G.W. Stewart, ACM TOMS 2 (1976) pp. 275-280.).
 
Classes  :  D4c2b . Compute eigenvalues of Hessenberg matrix
 
Type     : Fortran software in TOMS collection.
Access   : Some uses prohibited. Portable.
Precision: Single.
 
Usage    : CALL HQR3(A, V, N, NLOW, NUP, EPS, ER, EI, TYPE, NA, NV)
 
Details  : Fullsource
Sites    : (1) NETLIB
 

Implementation of 506 from TOMS on NETLIB

 
NETLIB:    Public access repository, The University of Tennessee at
           Knoxville and Bell Laboratories
 
Precision: Single.
 
You may access components from NETLIB outside GAMS as follows.
 
   Fullsource   : echo "send 506 from toms" | mail netlib@ornl.gov