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5 papers

math.NT2026

Large sieve inequality for sums of Legendre symbols over short intervals

Marc Munsch, Igor Shparlinski, Yu-Chen Sun +1

The paper establishes a nontrivial upper bound for the second moment of sums of Legendre symbols over short intervals using the Burgess bound and Selberg sieve, showing that for mo…

math.NT2026

Small values of signed harmonic sums and logarithmic means of multiplicative functions

Oleksiy Klurman, Marc Munsch, Yu-Chen Sun

We construct sequences with small values of signed harmonic sums \[ \sum_{n\in\mathcal{A}\cap[1,N]}\frac{a_n}{n}, \] for any reas…

math.NT2026

Large values of for subgroups of characters

Pranendu Darbar, Bryce Kerr, Marc Munsch +1

We obtain (conditional and unconditional) results on large values of -functions in the critical strip when the character runs through a th…

math.NT2025

Bounds for moments of quadratic character sums and theta functions

Marc Munsch, Yuichiro Toma

In this paper, we investigate the size of moments of quadratic character sums averaged over the family of fundamental discriminants. We obtain an asymptotic formula for all integer…

math.NT2025

Moments and non-vanishing of -functions over thin subgroups

Marc Munsch, Igor E. Shparlinski

We obtain an asymptotic formula for all moments of Dirichlet -functions modulo when averaged over a subgroup of characters of size with $φ(d)=o(\lo…