SRC/zrot.f(3)

NAME
SRC/zrot.f

SYNOPSIS

  Functions/Subroutines
subroutine zrot (n, cx, incx, cy, incy, c, s)
ZROT applies a plane rotation with real cosine and complex sine to a pair of complex vectors.

Function/Subroutine Documentation

  subroutine zrot (integer n, complex*16, dimension( * ) cx, integer incx, complex*16, dimension( * ) cy, integer incy, double precision c, complex*16 s)

ZROT applies a plane rotation with real cosine and complex sine to a pair of complex vectors.

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 complex.
    !>

Parameters
    N

    !>          N is INTEGER
    !>          The number of elements in the vectors CX and CY.
    !>

    CX

    !>          CX is COMPLEX*16 array, dimension (N)
    !>          On input, the vector X.
    !>          On output, CX is overwritten with C*X + S*Y.
    !>

    INCX

    !>          INCX is INTEGER
    !>          The increment between successive values of CX.  INCX <> 0.
    !>

    CY

    !>          CY is COMPLEX*16 array, dimension (N)
    !>          On input, the vector Y.
    !>          On output, CY is overwritten with -CONJG(S)*X + C*Y.
    !>

    INCY

    !>          INCY is INTEGER
    !>          The increment between successive values of CY.  INCX <> 0.
    !>

    C

    !>          C is DOUBLE PRECISION
    !>

    S

    !>          S is COMPLEX*16
    !>          C and S define a rotation
    !>             [  C          S  ]
    !>             [ -conjg(S)   C  ]
    !>          where C*C + S*CONJG(S) = 1.0.
    !>

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 102 of file zrot.f.

Author

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