clacrt(3)

NAME

CLACRT - 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 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 ]

LAPACK version 3.0 15 June 2000

CLACRT(3)