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)