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Metric theory of Weyl sums

Abstract:

We prove that there exist positive constants C and c such that for any integer d⩾ 2 the set of x∈ [0 , 1) d satisfying cN1/2⩽|∑n=1Nexp(2πi(x1n+…+xdnd))|⩽CN1/2for infinitely many natural numbers N is of full Lebesque measure. This substantially improves the previous results where similar sets have been measured in terms of the Hausdorff dimension. We also obtain similar bounds for exponential sums with monomials xnd when d≠ 4. Finally, we obtain lower bounds for the Hausdorff dimension of large values of general exponential polynomials.

Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1007/s00208-021-02352-x

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Role:
Author
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Role:
Author
ORCID:
0000-0002-5246-9391


Publisher:
Springer
Journal:
Mathematische Annalen More from this journal
Volume:
385
Pages:
309-355
Publication date:
2022-01-05
Acceptance date:
2021-12-17
DOI:
EISSN:
1432-1807
ISSN:
0025-5831


Language:
English
Keywords:
Pubs id:
1232193
Local pid:
pubs:1232193
Deposit date:
2022-01-14

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