In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: Its Mukai variety is useful in defining abelian varieties, and the essentially identical Plancherel theorem and Parsevals theorem show that it is unitary and applying one of these to a Dirac comb will result in another Dirac comb. It is integral to the Nyquist-Shannon sampling theorem, and both Bluestein's algorithm and Rader's algorithm compute a form of it by transforming it into a convolution, while runtime big-O of n log n for one variety of them is achieved by recursively breaking it down into smaller ones, a technique known as the Cooley-Tukey algorithm. Commonly used in signal and image processing, FTP, name this mathematical operation that breaks a function down into a spectrum of its component sinusoidal frequencies.
A:
Science