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
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 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.
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