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RedHat 9 (Linux i386) - man page for clapll (redhat section l)

CLAPLL(l)					)					CLAPLL(l)

NAME
       CLAPLL - two column vectors X and Y, let  A = ( X Y )

SYNOPSIS
       SUBROUTINE CLAPLL( N, X, INCX, Y, INCY, SSMIN )

	   INTEGER	  INCX, INCY, N

	   REAL 	  SSMIN

	   COMPLEX	  X( * ), Y( * )

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.

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

       X       (input/output) COMPLEX 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 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) REAL
	       The smallest singular value of the N-by-2 matrix A = ( X Y ).

LAPACK version 3.0			   15 June 2000 				CLAPLL(l)


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