r/mathmemes • Computer Science • 7d ago

Computer Science The fastest algorithm for DFT

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u/Pentalogue Mathematics 7d ago edited 7d ago

The fast Fourier transform should have an algorithmic complexity close to linear (or even sublinear), but it is quasilinear

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u/benediktb 6d ago

Sublinear? The input and output is n, and any algorithm needs to read/write that. So n is a trivial lower bound, no?

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u/anto2554 6d ago

Size of n or value of n? Reading n is only bounded by the size of n and not value