SRC/sorgl2.f(3)

NAME
SRC/sorgl2.f

SYNOPSIS

  Functions/Subroutines
subroutine sorgl2 (m, n, k, a, lda, tau, work, info)
SORGL2

Function/Subroutine Documentation

  subroutine sorgl2 (integer m, integer n, integer k, real, dimension( lda, * ) a, integer lda, real, dimension( * ) tau, real, dimension( * ) work, integer info)

SORGL2

Purpose:

    !>
    !> SORGL2 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 SGELQF.
    !>

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 REAL 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 SGELQF 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 REAL array, dimension (K)
    !>          TAU(i) must contain the scalar factor of the elementary
    !>          reflector H(i), as returned by SGELQF.
    !>

    WORK

    !>          WORK is REAL 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 sorgl2.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.