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The FORTRAN level-1 BLAS call for this operation is

`
`

`
Here is replaced by ``S`, `D`, `C`, or `Z`
to indicate the data type of the operands (single, double, complex, double precision complex).
Parameter `N` equals the length of the vectors, *n* .
Parameters `X`, and `Y` equal the
addresses of where vectors *x* , and *y* start in
memory. The strides for the vectors are given in `INCX` and `INCY`.
The result is returned as the function value.
`
`

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