ZROT (3lapack)

applie a plane rotation, where the cos (C) is real and the sin (S) is complex, and the vectors CX and CY are complex

SYNOPSIS

  SUBROUTINE ZROT( N, CX, INCX, CY, INCY, C, S )

      INTEGER      INCX, INCY, N

      DOUBLE       PRECISION C

      COMPLEX*16   S

      COMPLEX*16   CX( * ), CY( * )

PURPOSE

  ZROT   applies a plane rotation, where the cos (C) is real and the sin (S)
  is complex, and the vectors CX and CY are complex.

ARGUMENTS

  N       (input) INTEGER
          The number of elements in the vectors CX and CY.

  CX      (input/output) COMPLEX*16 array, dimension (N)
          On input, the vector X.  On output, CX is overwritten with C*X +
          S*Y.

  INCX    (input) INTEGER
          The increment between successive values of CY.  INCX <> 0.

  CY      (input/output) COMPLEX*16 array, dimension (N)
          On input, the vector Y.  On output, CY is overwritten with
          -CONJG(S)*X + C*Y.

  INCY    (input) INTEGER
          The increment between successive values of CY.  INCX <> 0.

  C       (input) DOUBLE PRECISION
          S       (input) COMPLEX*16 C and S define a rotation [  C
          S  ] [ -conjg(S)   C  ] where C*C + S*CONJG(S) = 1.0.