_ORTRAN(3F)_ORTRAN(3F)NAME
ORTRAN, SORTRAN - EISPACK routine. This subroutine accumulates the
orthogonal similarity transformations used in the reduction of a REAL
GENERAL matrix to upper Hessenberg form by ORTHES.
SYNOPSYS
subroutine ortran(nm, n, low, igh, a, ort, z)
integer nm, n, low, igh
double precision a(nm,igh), ort(igh), z(nm,n)
subroutine sortran(nm, n, low, igh, a, ort, z)
integer nm, n, low, igh
real a(nm,igh), ort(igh), z(nm,n)
DESCRIPTION
On INPUT
NM must be set to the row dimension of two-dimensional array parameters
as declared in the calling program dimension statement.
N is the order of the matrix.
LOW and IGH are integers determined by the balancing subroutine BALANC.
If BALANC has not been used, set LOW=1, IGH=N.
A contains information about the orthogonal trans- formations used in the
reduction by ORTHES in its strict lower triangle.
ORT contains further information about the trans- formations used in the
reduction by ORTHES. only elements LOW through IGH are USED. On OUTPUT
Z contains the transformation matrix produced in the reduction by
ORTHES.
ORT has been altered. Questions and comments should be directed to B. S.
Garbow, APPLIED MATHEMATICS DIVISION, ARGONNE NATIONAL LABORATORY
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