CLACRT - perform the operation ( c s )( x ) ==> ( x ) (
-s c )( y ) ( y ) where c and s are complex and the vec
tors x and y are complex
SYNOPSIS
SUBROUTINE CLACRT( N, CX, INCX, CY, INCY, C, S )
INTEGER INCX, INCY, N
COMPLEX C, S
COMPLEX CX( * ), CY( * )
PURPOSE
CLACRT 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 array, dimension (N)
On input, the vector x. On output, CX is over
written with c*x + s*y.
INCX (input) INTEGER
The increment between successive values of CX.
INCX <> 0.
CY (input/output) COMPLEX array, dimension (N)
On input, the vector y. On output, CY is over
written with -s*x + c*y.
INCY (input) INTEGER
The increment between successive values of CY.
INCY <> 0.
C (input) COMPLEX
S (input) COMPLEX C and S define the matrix
[ C S ]. [ -S C ]
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