Definition of Fourier's theorem
: a theorem in mathematics: under suitable conditions any periodic function can be represented by a Fourier series
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“Fourier's theorem.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Fourier%27s%20theorem. Accessed 30 Nov. 2021.
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The first known use of Fourier's theorem was in 1834
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