ZLACRT (3lapack)

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

SYNOPSIS

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

      INTEGER        INCX, INCY, N

      COMPLEX*16     C, S

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

PURPOSE

  ZLACRT applies a plane rotation, where the cos and sin (C and S) are
  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 -S*X +
          C*Y.

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

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