ZLACRT(3)
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
SYNOPSIS
- SUBROUTINE ZLACRT(
-
N, CX, INCX, CY, INCY, C, S )
-
INTEGER
INCX, INCY, N
-
COMPLEX*16
C, S
-
COMPLEX*16
CX( * ), CY( * )
PURPOSE
ZLACRT performs the operation
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 ]
