Abstract
We introduce and analyze a general class of not necessarily bounded multiplicative functions, examples of which include the function , where and where counts the number of distinct prime factors of , as well as the function , where denotes the Fourier coefficients of a primitive holomorphic cusp form.
For this class of functions we show that after applying a -trick, their elements become orthogonal to polynomial nilsequences. The resulting functions therefore have small uniformity norms of all orders by the Green–Tao–Ziegler inverse theorem, a consequence that will be used in a separate paper in order to asymptotically evaluate linear correlations of multiplicative functions from our class. Our result generalizes work of Green and Tao on the Möbius function.
Citation
Lilian Matthiesen. "Generalized Fourier coefficients of multiplicative functions." Algebra Number Theory 12 (6) 1311 - 1400, 2018. https://doi.org/10.2140/ant.2018.12.1311
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