CXML
        	    
LAPACK version 3.0
zlacrt(3)

PURPOSE
  ZLACRT - perform the operation  ( c s )( x ) ==> ( x ) ( -s c )( y ) ( y )
  where c and s are complex and the vectors x and y are complex

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

      INTEGER	     INCX, INCY, N

      COMPLEX*16     C, S

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

DESCRIPTION
  ZLACRT performs the operation ( c s )( x ) ==> ( x ) ( -s c )( y ) ( y )
  where c and s are complex and the vectors x and y 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 CX.  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.  INCY <> 0.

  C	  (input) COMPLEX*16
	  S	  (input) COMPLEX*16 C and S define the matrix [  C   S	 ].
	  [ -S	 C  ]