activity
20022025
most citedArithmetic statistics of modular symbols

14 citations · 55 across the 22 of their papers we have counts for

collaborators

27 papers

math.NT2025

The hyperbolic circle problem over Heegner points

Dimitrios Chatzakos, Giacomo Cherubini, Stephen Lester +1

For the full modular group, we obtain a logarithmic improvement on Selberg's long-standing bound for the error term of the counting function in the hyperbolic circle problem over H…

math.NT2024

Counting and equidistribution over primes in hyperbolic groups

Yiannis N. Petridis, Morten S. Risager

We consider equidistribution of angles for certain hyperbolic lattice points in the upper half-plane. Extending work of Friedlander and Iwaniec we show that for the full modular gr…

math.NT2022

The distribution of Manin's iterated integrals of modular forms

Nils Matthes, Morten S. Risager

We determine the asymptotic distribution of Manin's iterated integrals of length at most 2. For all lengths we compute all the asymptotic moments. We show that if the length is at…

math.NT2021

Bounds on shifted convolution sums for Hecke eigenforms

Asbjorn Christian Nordentoft, Yiannis N. Petridis, Morten S. Risager

Shifted convolution sums play a prominent rôle in analytic number theory. We investigate pointwise bounds, mean-square bounds, and average bounds for shifted convolution sums for H…

math.NT2020

Small scale equidistribution of Hecke eigenforms at infinity

Asbjorn Christian Nordentoft, Yiannis N. Petridis, Morten S. Risager

We investigate the equidistribution of Hecke eigenforms on sets that are shrinking towards infinity. We show that at scales finer than the Planck scale they do not equidistribute w…

math.NT2019★ 1 cited

Prime geodesics and averages of the Zagier -series

Olga Balkanova, Dmitry Frolenkov, Morten S. Risager

The Zagier -series encode data of real quadratic fields. We study the average size of these -series, and prove asymptotic expansions and omega results for the expansion. We t…