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The Fourier Transform

DNA's double helix, the sunspot cycle and the sawtooth signals of electronics can be reduced mathematically to a series of undulating curves. This idea underlies a powerful analytical tool

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Scientific American Magazine Vol 260 Issue 6This article was originally published with the title “The Fourier Transform” in Scientific American Magazine Vol. 260 No. 6 (), p. 86
doi:10.1038/scientificamerican0689-86