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Acronym:Fast Fourier Transform

Fast Fourier Transform is an efficient algorithm for computing DFT (discrete Fourier transform) or an inverse DFT. More efficient than a Discrete Cosine Transfer (DCT), although DCT is also based on Fourier transforms. Described by Dr. Gilbert Strang, one of the foremost mathmeticians and a professor at MIT, as "the most important numerical algorithm of our lifetime" when referring to the most common FFT (known as the Cooley-Tukey algorithm).