nterface, where you can specify multiple simultaneous transforms via
some &ldquo;vector&rdquo; length <code>howmany</code>, a factor of <code>howmany</code> is
included in the product of the subsequent dimensions.)
</p>
<p>For a one-dimensional complex DFT, the length <code>N</code> of the data
should be divisible by <em>P</em> <em>squared</em> to be able to divide
the problem equally among the processes.
</p>



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