A1 Refereed original research article in a scientific journal
Fourier uniformity of bounded multiplicative functions in short intervals on average
Authors: Kaisa Matomäki, Maksym Radziwiłł, Terence Tao
Publisher: Springer New York LLC
Publication year: 2020
Journal: Inventiones Mathematicae
Journal name in source: Inventiones Mathematicae
Volume: 220
First page : 1
Last page: 58
eISSN: 1432-1297
DOI: https://doi.org/10.1007/s00222-019-00926-w
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/44132506
Let λ denote the Liouville function. We show that as X→∞ ,
∫2XXsupα∣∣∣∣∑x
for all H≥Xθ with θ>0 fixed but arbitrarily small. Previously, this was only known for θ>5/8 . For smaller values of θ this is the first “non-trivial” case of local Fourier uniformity on average at this scale. We also obtain the analogous statement for (non-pretentious) 1-bounded multiplicative functions. We illustrate the strength of the result by obtaining cancellations in the sum of λ(n)Λ(n+h)Λ(n+2h) over the ranges h
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