Triple Correlation
The triple correlation of an ordinary function on the real line is the integral of the product of that function with two independently shifted copies of itself:
The Fourier transform of triple correlation is the bispectrum. The triple correlation extends the concept of autocorrelation, which correlates a function with a single shifted copy of itself and thereby enhances its latent periodicities.
Read more about Triple Correlation: History, Applications, Extension To Groups
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