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Diffstat (limited to 'SRC/dlabrd.f')
| -rw-r--r-- | SRC/dlabrd.f | 100 |
1 files changed, 73 insertions, 27 deletions
diff --git a/SRC/dlabrd.f b/SRC/dlabrd.f index 51255d24..406a7b7f 100644 --- a/SRC/dlabrd.f +++ b/SRC/dlabrd.f @@ -66,59 +66,105 @@ *> The number of leading rows and columns of A to be reduced. *> \endverbatim *> -* -* Authors -* ======= -* -*> \author Univ. of Tennessee -*> \author Univ. of California Berkeley -*> \author Univ. of Colorado Denver -*> \author NAG Ltd. -* -*> \date November 2011 -* -*> \ingroup doubleOTHERauxiliary -* -* -* Further Details -* =============== -*>\details \b Further \b Details +*> \param[in,out] A *> \verbatim -* See Further Details. +*> A is DOUBLE PRECISION array, dimension (LDA,N) +*> On entry, the m by n general matrix to be reduced. +*> On exit, the first NB rows and columns of the matrix are +*> overwritten; the rest of the array is unchanged. +*> If m >= n, elements on and below the diagonal in the first NB +*> columns, with the array TAUQ, represent the orthogonal +*> matrix Q as a product of elementary reflectors; and +*> elements above the diagonal in the first NB rows, with the +*> array TAUP, represent the orthogonal matrix P as a product +*> of elementary reflectors. +*> If m < n, elements below the diagonal in the first NB +*> columns, with the array TAUQ, represent the orthogonal +*> matrix Q as a product of elementary reflectors, and +*> elements on and above the diagonal in the first NB rows, +*> with the array TAUP, represent the orthogonal matrix P as +*> a product of elementary reflectors. +*> See Further Details. +*> \endverbatim *> -*> LDA (input) INTEGER +*> \param[in] LDA +*> \verbatim +*> LDA is INTEGER *> The leading dimension of the array A. LDA >= max(1,M). +*> \endverbatim *> -*> D (output) DOUBLE PRECISION array, dimension (NB) +*> \param[out] D +*> \verbatim +*> D is DOUBLE PRECISION array, dimension (NB) *> The diagonal elements of the first NB rows and columns of *> the reduced matrix. D(i) = A(i,i). +*> \endverbatim *> -*> E (output) DOUBLE PRECISION array, dimension (NB) +*> \param[out] E +*> \verbatim +*> E is DOUBLE PRECISION array, dimension (NB) *> The off-diagonal elements of the first NB rows and columns of *> the reduced matrix. +*> \endverbatim *> -*> TAUQ (output) DOUBLE PRECISION array dimension (NB) +*> \param[out] TAUQ +*> \verbatim +*> TAUQ is DOUBLE PRECISION array dimension (NB) *> The scalar factors of the elementary reflectors which *> represent the orthogonal matrix Q. See Further Details. +*> \endverbatim *> -*> TAUP (output) DOUBLE PRECISION array, dimension (NB) +*> \param[out] TAUP +*> \verbatim +*> TAUP is DOUBLE PRECISION array, dimension (NB) *> The scalar factors of the elementary reflectors which *> represent the orthogonal matrix P. See Further Details. +*> \endverbatim *> -*> X (output) DOUBLE PRECISION array, dimension (LDX,NB) +*> \param[out] X +*> \verbatim +*> X is DOUBLE PRECISION array, dimension (LDX,NB) *> The m-by-nb matrix X required to update the unreduced part *> of A. +*> \endverbatim *> -*> LDX (input) INTEGER +*> \param[in] LDX +*> \verbatim +*> LDX is INTEGER *> The leading dimension of the array X. LDX >= max(1,M). +*> \endverbatim *> -*> Y (output) DOUBLE PRECISION array, dimension (LDY,NB) +*> \param[out] Y +*> \verbatim +*> Y is DOUBLE PRECISION array, dimension (LDY,NB) *> The n-by-nb matrix Y required to update the unreduced part *> of A. +*> \endverbatim *> -*> LDY (input) INTEGER +*> \param[in] LDY +*> \verbatim +*> LDY is INTEGER *> The leading dimension of the array Y. LDY >= max(1,N). +*> \endverbatim *> +* +* Authors +* ======= +* +*> \author Univ. of Tennessee +*> \author Univ. of California Berkeley +*> \author Univ. of Colorado Denver +*> \author NAG Ltd. +* +*> \date November 2011 +* +*> \ingroup doubleOTHERauxiliary +* +* +* Further Details +* =============== +*>\details \b Further \b Details +*> \verbatim *> *> The matrices Q and P are represented as products of elementary *> reflectors: |