ZLACRT(3F)ZLACRT(3F)NAME
ZLACRT - applie a plane rotation, where the cos and sin (C and S) are
complex and the vectors CX and CY are complex
SYNOPSIS
SUBROUTINE ZLACRT( N, CX, INCX, CY, INCY, C, S )
INTEGER INCX, INCY, N
COMPLEX*16 C, S
COMPLEX*16 CX( * ), CY( * )
PURPOSE
ZLACRT applies a plane rotation, where the cos and sin (C and S) are
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*16 array, dimension (N)
On input, the vector X. On output, CX is overwritten 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 overwritten with -S*X +
C*Y.
INCY (input) INTEGER
The increment between successive values of CY. INCX <> 0.
C (input) COMPLEX*16
S (input) COMPLEX*16 C and S define a complex rotation [ C
S ] [ -S C ] where C*C + S*S = 1.0.
Page 1
