SRC/dorgl2.f(3)

NAME
SRC/dorgl2.f

SYNOPSIS

  Functions/Subroutines
subroutine dorgl2 (m, n, k, a, lda, tau, work, info)
DORGL2

Function/Subroutine Documentation

  subroutine dorgl2 (integer m, integer n, integer k, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( * ) tau, double precision, dimension( * ) work, integer info)

DORGL2

Purpose:

    !>
    !> DORGL2 generates an m by n real matrix Q with orthonormal rows,
    !> which is defined as the first m rows of a product of k elementary
    !> reflectors of order n
    !>
    !>       Q  =  H(k) . . . H(2) H(1)
    !>
    !> as returned by DGELQF.
    !>

Parameters
    M

    !>          M is INTEGER
    !>          The number of rows of the matrix Q. M >= 0.
    !>

    N

    !>          N is INTEGER
    !>          The number of columns of the matrix Q. N >= M.
    !>

    K

    !>          K is INTEGER
    !>          The number of elementary reflectors whose product defines the
    !>          matrix Q. M >= K >= 0.
    !>

    A

    !>          A is DOUBLE PRECISION array, dimension (LDA,N)
    !>          On entry, the i-th row must contain the vector which defines
    !>          the elementary reflector H(i), for i = 1,2,...,k, as returned
    !>          by DGELQF in the first k rows of its array argument A.
    !>          On exit, the m-by-n matrix Q.
    !>

    LDA

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

    TAU

    !>          TAU is DOUBLE PRECISION array, dimension (K)
    !>          TAU(i) must contain the scalar factor of the elementary
    !>          reflector H(i), as returned by DGELQF.
    !>

    WORK

    !>          WORK is DOUBLE PRECISION array, dimension (M)
    !>

    INFO

    !>          INFO is INTEGER
    !>          = 0: successful exit
    !>          < 0: if INFO = -i, the i-th argument has an illegal value
    !>

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 112 of file dorgl2.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.