zlartg.f(3)							      LAPACK							       zlartg.f(3)

NAME

       zlartg.f -

SYNOPSIS

   Functions/Subroutines
       subroutine zlartg (F, G, CS, SN, R)
	   ZLARTG

Function/Subroutine Documentation
   subroutine zlartg (complex*16F, complex*16G, double precisionCS, complex*16SN, complex*16R)
       ZLARTG

       Purpose:

	    ZLARTG generates a plane rotation so that

	       [  CS  SN  ]	[ F ]	  [ R ]
	       [  __	  ]  .	[   ]  =  [   ]   where CS**2 + |SN|**2 = 1.
	       [ -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.

       Parameters:
	   F

		     F is COMPLEX*16
		     The first component of vector to be rotated.

	   G

		     G is COMPLEX*16
		     The second component of vector to be rotated.

	   CS

		     CS is DOUBLE PRECISION
		     The cosine of the rotation.

	   SN

		     SN is COMPLEX*16
		     The sine of the rotation.

	   R

		     R is COMPLEX*16
		     The nonzero component of the rotated vector.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Further Details:

	     3-5-96 - 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.

       Definition at line 104 of file zlartg.f.

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

Version 3.4.1							  Sun May 26 2013						       zlartg.f(3)