zrot(3)

NAME

ZROT - applie a plane rotation, where the cos (C) is real

and the sin (S) is complex, and the vectors CX and CY are complex

SYNOPSIS

SUBROUTINE ZROT( N, CX, INCX, CY, INCY, C, S )
    INTEGER      INCX, INCY, N
    DOUBLE       PRECISION C
    COMPLEX*16   S
    COMPLEX*16   CX( * ), CY( * )

PURPOSE

ZROT applies a plane rotation, where the cos (C) is real

and the sin (S) is complex, and the vectors CX and CY are com

plex.

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 over

written with C*X + S*Y.

INCX (input) INTEGER

The increment between successive values of CY.

INCX <> 0.

CY (input/output) COMPLEX*16 array, dimension (N)

On input, the vector Y. On output, CY is over

written with -CONJG(S)*X + C*Y.

INCY (input) INTEGER

The increment between successive values of CY.

INCX <> 0.

C (input) DOUBLE PRECISION

S (input) COMPLEX*16 C and S define a rota

tion [ C S ] [ -conjg(S) C ] where C*C + S*CONJG(S)

= 1.0.

LAPACK version 3.0 15 June 2000

ZROT(3)