Discrete-time Fourier transform

https://www.wikidata.org/wiki/Q1440048

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Physics 33M papers	Mathematics 21.8M papers	Quantum mechanics 13.3M papers	Mathematical analysis 5.4M papers
Fourier transform 160k papers	Fourier analysis 49.2k papers	Fractional Fourier transform 22.6k papers	Short-time Fourier transform 14.7k papers
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Discrete-time Fourier transform 2,385 papers
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