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A comment on Fourier transform – A math tool used in optics, MP3s, JPEGs and more (2013). Parent comment

Re:Fourier transform – A math tool used in optics, MP3s, JPE... by hchenji on Tuesday April 11, 2017 @11:56PM (#14094629)
Yes. See Haar Basis on page 4 of http://www.fourierandwavelets.org/FSP_v1.1_2014.pdf
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