zlartg (l)  Linux Manuals
zlartg: generates a plane rotation so that [ CS SN ] [ F ] [ R ] [ __ ]
Command to display zlartg
manual in Linux: $ man l zlartg
NAME
ZLARTG  generates a plane rotation so that [ CS SN ] [ F ] [ R ] [ __ ]
SYNOPSIS
 SUBROUTINE ZLARTG(

F, G, CS, SN, R )

DOUBLE
PRECISION CS

COMPLEX*16
F, G, R, SN
PURPOSE
ZLARTG generates a plane rotation so that
[
SN CS ] [ G ] [ 0 ]
This is a faster version of the BLAS1 routine ZROTG, except for
the following differences:
F and G are unchanged on return.
If G=0, then CS=1 and SN=0.
If F=0, then CS=0 and SN is chosen so that R is real.
ARGUMENTS
 F (input) COMPLEX*16

The first component of vector to be rotated.
 G (input) COMPLEX*16

The second component of vector to be rotated.
 CS (output) DOUBLE PRECISION

The cosine of the rotation.
 SN (output) COMPLEX*16

The sine of the rotation.
 R (output) COMPLEX*16

The nonzero component of the rotated vector.
FURTHER DETAILS
3596  Modified with a new algorithm by W. Kahan and J. Demmel
This version has a few statements commented out for thread safety
(machine parameters are computed on each entry). 10 feb 03, SJH.
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