DSYTD2Run Method

public void Run(
	string UPLO,
	int N,
	ref double[] A,
	int offset_a,
	int LDA,
	ref double[] D,
	int offset_d,
	ref double[] E,
	int offset_e,
	ref double[] TAU,
	int offset_tau,
	ref int INFO
)

Public Sub Run ( 
	UPLO As String,
	N As Integer,
	ByRef A As Double(),
	offset_a As Integer,
	LDA As Integer,
	ByRef D As Double(),
	offset_d As Integer,
	ByRef E As Double(),
	offset_e As Integer,
	ByRef TAU As Double(),
	offset_tau As Integer,
	ByRef INFO As Integer
)

Parameters

UPLO  String

(input) CHARACTER*1 Specifies whether the upper or lower triangular part of the symmetric matrix A is stored: = 'U': Upper triangular = 'L': Lower triangular

N  Int32

(input) INTEGER The order of the matrix A. N .GE. 0.

A  Double

(input/output) DOUBLE PRECISION array, dimension (LDA,N) On entry, the symmetric matrix A. If UPLO = 'U', the leading n-by-n upper triangular part of A contains the upper triangular part of the matrix A, and the strictly lower triangular part of A is not referenced. If UPLO = 'L', the leading n-by-n lower triangular part of A contains the lower triangular part of the matrix A, and the strictly upper triangular part of A is not referenced. On exit, if UPLO = 'U', the diagonal and first superdiagonal of A are overwritten by the corresponding elements of the tridiagonal matrix T, and the elements above the first superdiagonal, with the array TAU, represent the orthogonal matrix Q as a product of elementary reflectors; if UPLO = 'L', the diagonal and first subdiagonal of A are over- written by the corresponding elements of the tridiagonal matrix T, and the elements below the first subdiagonal, with the array TAU, represent the orthogonal matrix Q as a product of elementary reflectors. See Further Details.

offset_a  Int32

 

LDA  Int32

(input) INTEGER The leading dimension of the array A. LDA .GE. max(1,N).

D  Double

(output) DOUBLE PRECISION array, dimension (N) The diagonal elements of the tridiagonal matrix T: D(i) = A(i,i).

offset_d  Int32

 

E  Double

(output) DOUBLE PRECISION array, dimension (N-1) The off-diagonal elements of the tridiagonal matrix T: E(i) = A(i,i+1) if UPLO = 'U', E(i) = A(i+1,i) if UPLO = 'L'.

offset_e  Int32

 

TAU  Double

(output) DOUBLE PRECISION array, dimension (N-1) The scalar factors of the elementary reflectors (see Further Details).

offset_tau  Int32

 

INFO  Int32

(output) INTEGER = 0: successful exit .LT. 0: if INFO = -i, the i-th argument had an illegal value.

Reference