ZLARGV (3lapack)

generate a vector of complex plane rotations with real cosines, determined by elements of the complex vectors x and y

SYNOPSIS

  SUBROUTINE ZLARGV( N, X, INCX, Y, INCY, C, INCC )

      INTEGER        INCC, INCX, INCY, N

      DOUBLE         PRECISION C( * )

      COMPLEX*16     X( * ), Y( * )

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) ) = ( a(i) )
     ( -conjg(s(i))  c(i) ) ( y(i) ) = (   0  )

ARGUMENTS

  N       (input) INTEGER
          The number of plane rotations to be generated.

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

  INCX    (input) INTEGER
          The increment between elements of X. INCX > 0.

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

  INCY    (input) INTEGER
          The increment between elements of Y. INCY > 0.

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

  INCC    (input) INTEGER
          The increment between elements of C. INCC > 0.