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

NAME

       LAPACK-3 - two column vectors X and Y, let   A = ( X Y )

SYNOPSIS

       SUBROUTINE ZLAPLL( N, X, INCX, Y, INCY, SSMIN )

           INTEGER        INCX, INCY, N

           DOUBLE         PRECISION SSMIN

           COMPLEX*16     X( * ), Y( * )

PURPOSE

       Given two column vectors X and Y, let
        The subroutine first computes the QR factorization of A = Q*R,
        and then computes the SVD of the 2-by-2 upper triangular matrix R.
        The smaller singular value of R is returned in SSMIN, which is used
        as the measurement of the linear dependency of the vectors X and Y.

ARGUMENTS

        N       (input) INTEGER
                The length of the vectors X and Y.

        X       (input/output) COMPLEX*16 array, dimension (1+(N-1)*INCX)
                On entry, X contains the N-vector X.
                On exit, X is overwritten.

        INCX    (input) INTEGER
                The increment between successive elements of X. INCX > 0.

        Y       (input/output) COMPLEX*16 array, dimension (1+(N-1)*INCY)
                On entry, Y contains the N-vector Y.
                On exit, Y is overwritten.

        INCY    (input) INTEGER
                The increment between successive elements of Y. INCY > 0.

        SSMIN   (output) DOUBLE PRECISION
                The smallest singular value of the N-by-2 matrix A = ( X Y ).

 LAPACK auxiliary routine (version 3.2)     April 2011                            ZLAPLL(3lapack)