ManagedLapack.SymmetricInvert Method

public override void SymmetricInvert(
	MatrixTriangle storedTriangle,
	int n,
	Span<double> a,
	int lda,
	ReadOnlySpan<int> ipiv,
	out int info
)

Public Overrides Sub SymmetricInvert ( 
	storedTriangle As MatrixTriangle,
	n As Integer,
	a As Span(Of Double),
	lda As Integer,
	ipiv As ReadOnlySpan(Of Integer),
	<OutAttribute> ByRef info As Integer
)

public:
virtual void SymmetricInvert(
	MatrixTriangle storedTriangle, 
	int n, 
	Span<double> a, 
	int lda, 
	ReadOnlySpan<int> ipiv, 
	[OutAttribute] int% info
) override

abstract SymmetricInvert : 
        storedTriangle : MatrixTriangle * 
        n : int * 
        a : Span<float> * 
        lda : int * 
        ipiv : ReadOnlySpan<int> * 
        info : int byref -> unit 
override SymmetricInvert : 
        storedTriangle : MatrixTriangle * 
        n : int * 
        a : Span<float> * 
        lda : int * 
        ipiv : ReadOnlySpan<int> * 
        info : int byref -> unit 

Parameters

storedTriangle  MatrixTriangle

            Specifies whether the details of the factorization are stored
            as an upper or lower triangular matrix.
            = 'U':  Upper triangular, form is A = U*D*UT;
            = 'L':  Lower triangular, form is A = L*D*LT.
            

n  Int32

            The order of the matrix A.  N >= 0.
            

a  Span<Double>

            A is TReal array, dimension (LDA,N)
            On entry, the block diagonal matrix D and the multipliers
            used to obtain the factor U or L as computed by DSYTRF.
            On exit, if INFO = 0, the (symmetric) inverse of the original
            matrix.  If UPLO = 'U', the upper triangular part of the
            inverse is formed and the part of A below the diagonal is not
            referenced; if UPLO = 'L' the lower triangular part of the
            inverse is formed and the part of A above the diagonal is
            not referenced.
            

lda  Int32

            The leading dimension of the array A.  LDA >= max(1,N).
            

ipiv  ReadOnlySpan<Int32>

            Dimension (N)
            Details of the interchanges and the block structure of D
            as determined by DSYTRF.
            

info  Int32

            = 0: successful exit
            < 0: if INFO = -i, the i-th argument had an illegal value
            > 0: if INFO = i, D(i,i) = 0; the matrix is singular and its
                 inverse could not be computed.
            

This method corresponds to the LAPACK routine ?SYTRI.

Reference