--- rpl/lapack/lapack/dgeqr2p.f 2012/08/22 09:48:13 1.8 +++ rpl/lapack/lapack/dgeqr2p.f 2016/08/27 15:34:22 1.13 @@ -1,4 +1,4 @@ -*> \brief \b DGEQR2P +*> \brief \b DGEQR2P computes the QR factorization of a general rectangular matrix with non-negative diagonal elements using an unblocked algorithm. * * =========== DOCUMENTATION =========== * @@ -34,7 +34,7 @@ *> \verbatim *> *> DGEQR2 computes a QR factorization of a real m by n matrix A: -*> A = Q * R. +*> A = Q * R. The diagonal entries of R are nonnegative. *> \endverbatim * * Arguments: @@ -58,7 +58,8 @@ *> On entry, the m by n matrix A. *> On exit, the elements on and above the diagonal of the array *> contain the min(m,n) by n upper trapezoidal matrix R (R is -*> upper triangular if m >= n); the elements below the diagonal, +*> upper triangular if m >= n). The diagonal entries of R are +*> nonnegative; the elements below the diagonal, *> with the array TAU, represent the orthogonal matrix Q as a *> product of elementary reflectors (see Further Details). *> \endverbatim @@ -96,7 +97,7 @@ *> \author Univ. of Colorado Denver *> \author NAG Ltd. * -*> \date November 2011 +*> \date November 2015 * *> \ingroup doubleGEcomputational * @@ -116,15 +117,17 @@ *> where tau is a real scalar, and v is a real vector with *> v(1:i-1) = 0 and v(i) = 1; v(i+1:m) is stored on exit in A(i+1:m,i), *> and tau in TAU(i). +*> +*> See Lapack Working Note 203 for details *> \endverbatim *> * ===================================================================== SUBROUTINE DGEQR2P( M, N, A, LDA, TAU, WORK, INFO ) * -* -- LAPACK computational routine (version 3.4.0) -- +* -- LAPACK computational routine (version 3.6.0) -- * -- LAPACK is a software package provided by Univ. of Tennessee, -- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- -* November 2011 +* November 2015 * * .. Scalar Arguments .. INTEGER INFO, LDA, M, N