crot(3)

NAME

CROT - 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 CROT( N, CX, INCX, CY, INCY, C, S )
    INTEGER      INCX, INCY, N
    REAL         C
    COMPLEX      S
    COMPLEX      CX( * ), CY( * )

PURPOSE

CROT 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 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 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) REAL

S (input) COMPLEX C and S define a rotation

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

1.0.

LAPACK version 3.0 15 June 2000

CROT(3)