Fast Algorithms
For the implementation of a "fast" algorithm (similar to how FFT computes the DFT), it is often desirable that the transform length is also highly composite, e.g. a power of two. However, there are specialized fast Fourier transform algorithms for finite fields, such as Wang and Zhu's algorithm, which are efficient regardless of whether the transform length factors.
Read more about this topic: Discrete Fourier Transform (general)
Famous quotes containing the word fast:
“On the beach at night,
Stands a child with her father,
Watching the east, the autumn sky.
Up through the darkness,
While ravening clouds, the burial clouds, in black masses spreading,
Lower sullen and fast athwart and down the sky,”
—Walt Whitman (18191892)