SRC/slapll.f(3)            Library Functions Manual            SRC/slapll.f(3)

NAME
       SRC/slapll.f

SYNOPSIS
   Functions/Subroutines
       subroutine slapll (n, x, incx, y, incy, ssmin)
           SLAPLL measures the linear dependence of two vectors.

Function/Subroutine Documentation
   subroutine slapll (integer n, real, dimension( * ) x, integer incx, real,
       dimension( * ) y, integer incy, real ssmin)
       SLAPLL measures the linear dependence of two vectors.

       Purpose:


            Given two column vectors X and Y, let

                                 A = ( X Y ).

            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.

       Parameters
           N

                     N is INTEGER
                     The length of the vectors X and Y.

           X

                     X is REAL array,
                                    dimension (1+(N-1)*INCX)
                     On entry, X contains the N-vector X.
                     On exit, X is overwritten.

           INCX

                     INCX is INTEGER
                     The increment between successive elements of X. INCX > 0.

           Y

                     Y is REAL array,
                                    dimension (1+(N-1)*INCY)
                     On entry, Y contains the N-vector Y.
                     On exit, Y is overwritten.

           INCY

                     INCY is INTEGER
                     The increment between successive elements of Y. INCY > 0.

           SSMIN

                     SSMIN is REAL
                     The smallest singular value of the N-by-2 matrix A = ( X Y ).

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 101 of file slapll.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0                 SRC/slapll.f(3)