Publication

Sign changes of Kloosterman sums with almost prime moduli

Ping Xi
2015
Journal Articles

Abstract

We prove that the Kloosterman sum changes sign infinitely often as runs over squarefree moduli with at most 10 prime factors, which improves the previous results of Fouvry and Michel, Sivak-Fischler and Matomaki, replacing 10 by 23, 18 and 15, respectively. The method combines the Selberg sieve, equidistribution of Kloosterman sums and spectral theory of automorphic forms.

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Sign changes of Kloosterman sums with almost prime moduli

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