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

NAME
       SRC/zlargv.f

SYNOPSIS
   Functions/Subroutines
       subroutine zlargv (n, x, incx, y, incy, c, incc)
           ZLARGV generates a vector of plane rotations with real cosines and
           complex sines.

Function/Subroutine Documentation
   subroutine zlargv (integer n, complex*16, dimension( * ) x, integer incx,
       complex*16, dimension( * ) y, integer incy, double precision,
       dimension( * ) c, integer incc)
       ZLARGV generates a vector of plane rotations with real cosines and
       complex sines.

       Purpose:


           !>
           !> ZLARGV generates a vector of complex plane rotations with real
           !> cosines, determined by elements of the complex vectors x and y.
           !> For i = 1,2,...,n
           !>
           !>    (        c(i)   s(i) ) ( x(i) ) = ( r(i) )
           !>    ( -conjg(s(i))  c(i) ) ( y(i) ) = (   0  )
           !>
           !>    where c(i)**2 + ABS(s(i))**2 = 1
           !>
           !> The following conventions are used (these are the same as in ZLARTG,
           !> but differ from the BLAS1 routine ZROTG):
           !>    If y(i)=0, then c(i)=1 and s(i)=0.
           !>    If x(i)=0, then c(i)=0 and s(i) is chosen so that r(i) is real.
           !>

       Parameters
           N

           !>          N is INTEGER
           !>          The number of plane rotations to be generated.
           !>

           X

           !>          X is COMPLEX*16 array, dimension (1+(N-1)*INCX)
           !>          On entry, the vector x.
           !>          On exit, x(i) is overwritten by r(i), for i = 1,...,n.
           !>

           INCX

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

           Y

           !>          Y is COMPLEX*16 array, dimension (1+(N-1)*INCY)
           !>          On entry, the vector y.
           !>          On exit, the sines of the plane rotations.
           !>

           INCY

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

           C

           !>          C is DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
           !>          The cosines of the plane rotations.
           !>

           INCC

           !>          INCC is INTEGER
           !>          The increment between elements of C. INCC > 0.
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Further Details:


           !>
           !>  6-6-96 - 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 121 of file zlargv.f.

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

LAPACK                          Version 3.12.0                 SRC/zlargv.f(3)