PLASMA
2.8.0
PLASMA - Parallel Linear Algebra for Scalable Multi-core Architectures
|
int PLASMA_dpocon | ( | PLASMA_enum | uplo, |
int | N, | ||
double * | A, | ||
int | LDA, | ||
double | Anorm, | ||
double * | rcond | ||
) |
PLASMA_dpocon - estimates the reciprocal of the condition number (in the 1-norm) of a complex Hermitian positive definite matrix using the Cholesky factorization A = U**T*U or A = L*L**T computed by PLASMA_dpotrf().
An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as
\[ rcond = \frac{1}{\|\|A\-\| \times \-\|A^{-1}\|\|} \]
[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] | A | The N-by-N matrix A. |
[in] | LDA | The leading dimension of the array A. LDA >= max(1,N). |
[in] | Anorm | If norm = PlasmaOneNorm, the 1-norm of the original matrix A. If norm = PlasmaInfNorm, the infinity-norm of the original matrix A. |
[out] | rcond | The reciprocal of the condition number of the matrix A, computed as stated above. |
PLASMA_SUCCESS | successful exit |
<0 | if -i, the i-th argument had an illegal value |