zlapll (l)  Linux Manuals
zlapll: two column vectors X and Y, let A = ( X Y )
Command to display zlapll
manual in Linux: $ man l zlapll
NAME
ZLAPLL  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 2by2 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+(N1)*INCX)

On entry, X contains the Nvector 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+(N1)*INCY)

On entry, Y contains the Nvector 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 Nby2 matrix A = ( X Y ).
Pages related to zlapll
 zlapll (3)
 zlapmt (l)  rearranges the columns of the M by N matrix X as specified by the permutation K(1),K(2),...,K(N) of the integers 1,...,N
 zla_gbamv (l)  performs one of the matrixvector operations y := alpha*abs(A)*abs(x) + beta*abs(y),
 zla_gbrcond_c (l)  ZLA_GBRCOND_C Compute the infinity norm condition number of op(A) * inv(diag(C)) where C is a DOUBLE PRECISION vector
 zla_gbrcond_x (l)  ZLA_GBRCOND_X Compute the infinity norm condition number of op(A) * diag(X) where X is a COMPLEX*16 vector
 zla_gbrfsx_extended (l)  computes ..
 zla_geamv (l)  performs one of the matrixvector operations y := alpha*abs(A)*abs(x) + beta*abs(y),
 zla_gercond_c (l)  ZLA_GERCOND_C compute the infinity norm condition number of op(A) * inv(diag(C)) where C is a DOUBLE PRECISION vector