ZLACRT(l) ) ZLACRT(l)NAME
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
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 ( 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 ]
LAPACK version 3.0 15 June 2000 ZLACRT(l)
