ajor</em> order, so that the last dimension has the
fastest-varying index in the array.  This layout is described further in
<a href="Multi_002ddimensional-Array-Format.html#Multi_002ddimensional-Array-Format">Multi-dimensional Array Format</a>.
</p>
<p>FFTW can also compute transforms of higher dimensionality.  In order to
avoid confusion between the various meanings of the the word
&ldquo;dimension&rdquo;, we use the term <em>rank</em>
<a name="index-rank"></a>
to denote the number of independent indices 