CDOTU(3)        BLAS routine of NEC Numeric Library Collection        CDOTU(3)



NAME
       CDOTU  -  BLAS level one, computes a dot product (inner product) of two
       complex vectors

SYNOPSIS
       COMPLEX FUNCTION CDOTU ( n, x, incx, y, incy )

           INTEGER              n, incx, incy

           COMPLEX              x, y


DESCRIPTION
       CDOTU computes a dot product of two complex vectors.

       This routine performs the following vector operation:

                                                     n
               CDOTU  <--  (transpose of x) * y  =  Sum  x(i)*y(i)
                                                    i=1
                                            T
       where x and y are real vectors, and x is the transpose of
       x.

       If n <= 0, CDOTU is set to 0.

ARGUMENTS
       n       INTEGER. (input)
               Number of elements in each vector.

       x       COMPLEX. (input)
               Array of dimension (n-1) * |incx| + 1.
               Array x contains the first vector operand.

       incx    INTEGER. (input)
               Increment between elements of x.
               If incx = 0, the results will be unpredictable.

       y       COMPLEX. (input)
               Array of dimension (n-1) * |incy| + 1.
               Array y contains the second vector operand.

       incy    INTEGER. (input)
               Increment between elements of y.
               If incy = 0, the results will be unpredictable.

RETURN VALUES
       CDOTU    COMPLEX. Result (dot product). (output)

NOTES
       This routine is Level 1  Basic  Linear  Algebra  Subprograms  (Level  1
       BLAS).

       When  working  backward  (incx < 0 or incy < 0), each routine starts at
       the end of the vector and moves backward, as follows:

            x(1-incx * (n-1)), x(1-incx * (n-2)), ..., x(1)

            y(1-incy * (n-1)), y(1-incy * (n-2)), ..., y(1)



BLAS routine                                                          CDOTU(3)