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BLASdpotrf Method

Computes the Cholesky factorization of a real symmetric positive-definite matrix. Use dpotrs(BlasUplo, Int32, Int32, Double, Int32, Double, Int32) for solving A*x=B using the factorisation.

Namespace:  DHIMath.Numerics
Assembly:  DHI.Mike1D.Generic (in DHI.Mike1D.Generic.dll) Version: 16.0.0.0 (11.1.1.1111)
Syntax
C#
Copy
public static int dpotrf(
	BlasUplo uplo,
	int n,
	double[] a,
	int lda
)

Parameters

uplo
Type: DHIMath.NumericsBlasUplo
'U': upper triangle of A is stored, 'L' lower triangle of A is stored
n
Type: SystemInt32
Size of A
a
Type: SystemDouble
Matrix A in column major order
lda
Type: SystemInt32
Leading dimension of A, usually n, but can be larger

Return Value

Type: Int32
0 on success, i when the leading minor of order i is not positive definite, and the factorization could not be completed
See Also