The Möbius function restricted to squarefrees up to R has Fourier ratio at least R to the power -1/4 minus epsilon, forcing any uniform learner for the class to use Omega(R) samples.
Moments of polynomials with random multiplicative coefficients , publisher =
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The Möbius function restricted to squarefrees up to R has Fourier ratio at least R to the power -1/4 minus epsilon, forcing any uniform learner for the class to use Omega(R) samples.
- Escaping Chaos in Random Multiplicative Functions