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math.NT2005
Negative values of truncations to
Andrew Granville, K. Soundararajan
For a given we consider the minimum of as ranges over all quadratic Dirichlet characters. For all large , this minimum is negative and we give upp…
math.NT2005
Large character sums: Pretentious characters and the Polya-Vinogradov Theorem
Andrew Granville, K. Soundararajan
In 1918 Polya and Vinogradov gave an upper bound for the maximal size of character sums which still remains the best known general estimate. One of the main results of this paper p…
math.NT2005★ 13 cited
Extreme values of
Andrew Granville, K. Soundararajan
Improving a result of N. Levinson, we exhibit large and small values of .