nag_zhpr2 (f16ssc) performs a Hermitian rank-2 update on a complex Hermitian matrix stored in packed form.
nag_zhpr2 (f16ssc) performs the Hermitian rank-2 update operation
where
is an
by
complex Hermitian matrix, stored in packed form,
and
are
-element complex vectors, while
is a complex scalar and
is a real scalar.
Basic Linear Algebra Subprograms Technical (BLAST) Forum (2001)
Basic Linear Algebra Subprograms Technical (BLAST) Forum Standard University of Tennessee, Knoxville, Tennessee
http://www.netlib.org/blas/blast-forum/blas-report.pdfThe BLAS standard requires accurate implementations which avoid unnecessary over/underflow (see Section 2.7 of
Basic Linear Algebra Subprograms Technical (BLAST) Forum (2001)).
Not applicable.
None.
Perform rank-2 update of complex Hermitian matrix
, stored using packed storage format, using vectors
and
:
where
is the
by
matrix given by
and where
and
The vector
is stored in every second element of array
y (
).