int PLASMA_spotrf	(	PLASMA_enum	uplo,
		int	N,
		float *	A,
		int	LDA
	)

PLASMA_spotrf - Computes the Cholesky factorization of a symmetric positive definite (or Hermitian positive definite in the complex case) matrix A. The factorization has the form

\[ A = \{_{L\times L^H, if uplo = PlasmaLower}^{U^H\times U, if uplo = PlasmaUpper} \]

where U is an upper triangular matrix and L is a lower triangular matrix.

Parameters

[in]	uplo	= PlasmaUpper: Upper triangle of A is stored; = PlasmaLower: Lower triangle of A is stored.
[in]	N	The order of the matrix A. N >= 0.
[in,out]	A	On entry, the symmetric positive definite (or Hermitian) matrix A. If uplo = PlasmaUpper, 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 return value = 0, the factor U or L from the Cholesky factorization A = U**T*U or A = L*L**T.
[in]	LDA	The leading dimension of the array A. LDA >= max(1,N).

Returns

Return values

PLASMA_SUCCESS	successful exit
<0	if -i, the i-th argument had an illegal value
>0	if i, the leading minor of order i of A is not positive definite, so the factorization could not be completed, and the solution has not been computed.

See also

PLASMA_spotrf_Tile

PLASMA_spotrf_Tile_Async

PLASMA_cpotrf

PLASMA_dpotrf

PLASMA_spotrf

PLASMA_spotrs