BlasL2HeR

Performs a rank-1 conjugated update of a Hermitian n-by-n matrix.

AU = alpha * x * conjg(x) + A

BLAS function HER.

Computing for type matrix<complex>

bool  matrixc::BlasL2HeR(
   complex         alpha,         // scalar multiplier alpha
   vectorc&        X,             // vector X
   matrixc&        AU             // updated matrix A
   );

Computing for type matrix<complexf>

bool  matrixcf::BlasL2HeR(
   complexf        alpha,         // scalar multiplier alpha
   vectorcf&       X,             // vector X
   matrixcf&       AU             // updated matrix A
   );

Parameters

alpha

[in] Scalar multiplier alpha.

[in] Vector x of size n.

[out] Updated matrix A.

Return Value

Return true if successful, otherwise false in case of an error.

Note

The input can be a Hermitian conjugated, upper triangular or lower triangular matrix. Triangular matrices are assumed to be Hermitian.

BlasL2SyR

BlasL2SyR2