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

NAME

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

SYNOPSIS

       SUBROUTINE ZUNG2L( M, N, K, A, LDA, TAU, WORK, INFO )

           INTEGER        INFO, K, LDA, M, N

           COMPLEX*16     A( LDA, * ), TAU( * ), WORK( * )

PURPOSE

       ZUNG2L generates an m by n complex 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 ZGEQLF.

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) COMPLEX*16 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 ZGEQLF 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) COMPLEX*16 array, dimension (K)
                TAU(i) must contain the scalar factor of the elementary
                reflector H(i), as returned by ZGEQLF.

        WORK    (workspace) COMPLEX*16 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                            ZUNG2L(3lapack)