Provided by: liblapack-doc_3.3.1-1_all bug

NAME

       LAPACK-3 - generates an m by n real matrix Q with orthonormal columns,

SYNOPSIS

       SUBROUTINE DORG2L( M, N, K, A, LDA, TAU, WORK, INFO )

           INTEGER        INFO, K, LDA, M, N

           DOUBLE         PRECISION A( LDA, * ), TAU( * ), WORK( * )

PURPOSE

       DORG2L generates an m by n real matrix Q with orthonormal columns,
        which is defined as the last n columns of a product of k elementary
        reflectors of order m
              Q  =  H(k) . . . H(2) H(1)
        as returned by DGEQLF.

ARGUMENTS

        M       (input) INTEGER
                The number of rows of the matrix Q. M >= 0.

        N       (input) INTEGER
                The number of columns of the matrix Q. M >= N >= 0.

        K       (input) INTEGER
                The number of elementary reflectors whose product defines the
                matrix Q. N >= K >= 0.

        A       (input/output) DOUBLE PRECISION array, dimension (LDA,N)
                On entry, the (n-k+i)-th column must contain the vector which
                defines the elementary reflector H(i), for i = 1,2,...,k, as
                returned by DGEQLF in the last k columns of its array
                argument A.
                On exit, the m by n matrix Q.

        LDA     (input) INTEGER
                The first dimension of the array A. LDA >= max(1,M).

        TAU     (input) DOUBLE PRECISION array, dimension (K)
                TAU(i) must contain the scalar factor of the elementary
                reflector H(i), as returned by DGEQLF.

        WORK    (workspace) DOUBLE PRECISION array, dimension (N)

        INFO    (output) INTEGER
                = 0: successful exit
                < 0: if INFO = -i, the i-th argument has an illegal value

 LAPACK routine (version 3.2)               April 2011                            DORG2L(3lapack)