DTRTRIRun Method

public void Run(
	string UPLO,
	string DIAG,
	int N,
	ref double[] A,
	int offset_a,
	int LDA,
	ref int INFO
)

Public Sub Run ( 
	UPLO As String,
	DIAG As String,
	N As Integer,
	ByRef A As Double(),
	offset_a As Integer,
	LDA As Integer,
	ByRef INFO As Integer
)

Parameters

UPLO  String

(input) CHARACTER*1 = 'U': A is upper triangular; = 'L': A is lower triangular.

DIAG  String

(input) CHARACTER*1 = 'N': A is non-unit triangular; = 'U': A is unit 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 triangular matrix A. If UPLO = 'U', the leading N-by-N upper triangular part of the array A contains the upper triangular matrix, and the strictly lower triangular part of A is not referenced. If UPLO = 'L', the leading N-by-N lower triangular part of the array A contains the lower triangular matrix, and the strictly upper triangular part of A is not referenced. If DIAG = 'U', the diagonal elements of A are also not referenced and are assumed to be 1. On exit, the (triangular) inverse of the original matrix, in the same storage format.

offset_a  Int32

 

LDA  Int32

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

INFO  Int32

(output) INTEGER = 0: successful exit .LT. 0: if INFO = -i, the i-th argument had an illegal value .GT. 0: if INFO = i, A(i,i) is exactly zero. The triangular matrix is singular and its inverse can not be computed.

Reference