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Abstracts for Conference on "Progress and Emergent Theories in Zeta and L-Functions" (PRETZL)

Alternatively have a look at the program.

Joint Moments

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Speaker: 
Jon Keating
Affiliation: 
University of Oxford
Date: 
Mon, 21/07/2025 - 10:00 - 10:50
Location: 
MPIM Lecture Hall

I will discuss the evaluation of the joint moments of the characteristic polynomials of random unitary matrices
and their derivatives, and in this context the joint moments of the Riemann zeta-function and its derivates, on
the critical line. I also hope to discuss extensions to other symmetry classes.

Mollifiers, long and short

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Speaker: 
Brian Conrey
Affiliation: 
AIM
Date: 
Mon, 21/07/2025 - 11:00 - 11:50
Location: 
MPIM Lecture Hall

This is joint with David Farmer, Chung Hang Kwan, Yongxiao Lin, and Caroline Turnage-Butterbaugh.
When studying the zeros of Riemann zeta function at a height $T$ up the critical strip one often multiplies
$\zeta$ times a Dirichlet polynomial, called a mollifier, of length $T^{\theta}$ before averaging in order to
pacify the irregularities of $\zeta$. The $\theta$ parameter here is critical.
Farmer conjectured that the mean square formulas one obtains for mollified zeta for small $\theta$ actually

The distribution of values of $L$-functions in the critical strip and applications

Posted in
Speaker: 
Youness Lamzouri
Affiliation: 
IECL Site de Nancy
Date: 
Mon, 21/07/2025 - 14:00 - 14:50
Location: 
MPIM Lecture Hall

In this talk, I will survey the history of the value distribution
theory of $L$-functions in the critical strip, focusing in particular on what is
known at the right of the critical line. I will then give three main applications
of this theory: counting zeros of linear combinations of $L$-functions near the
critical line, studying the distribution of class numbers of various families of
quadratic fields, and counting sign changes of quadratic character sums and
real zeros of Fekete polynomials.

Large Deviations of the Riemann zeta function on the critical line

Posted in
Speaker: 
Louis-Pierre Arguin
Affiliation: 
University of Oxford
Date: 
Mon, 21/07/2025 - 15:00 - 15:50
Location: 
MPIM Lecture Hall

Selbergs Central Limit Theorem asserts that the typical value of the logarithm of the zeta function at a height $T$
on the critical line is normally distributed with a standard deviation of order $(\log \log T)^{1/2}$. In this talk, we
will discuss recent works showing that these normal fluctuations persist, up to a constant, for values of the order of
the variance $\log \log T$. The results naturally relate to the works of Soundararajan and Harper on sharp upper
bounds of the $2k$-moments, as well as the work of Heap and Soundararajan on lower bounds. The connections

tba

Posted in
Speaker: 
Kannan Soundararajan
Affiliation: 
Stanford University
Date: 
Mon, 21/07/2025 - 16:30 - 17:20
Location: 
MPIM Lecture Hall

Speed talks

Posted in
Date: 
Mon, 21/07/2025 - 17:20 - 18:00
Location: 
MPIM Lecture Hall

tba

Posted in
Speaker: 
Paul Nelson
Affiliation: 
Aarhus University
Date: 
Tue, 22/07/2025 - 10:00 - 10:50
Location: 
MPIM Lecture Hall

The cubic moment of $L$-functions for specified local component families

Posted in
Speaker: 
Matt Young
Affiliation: 
Rutgers University
Date: 
Tue, 22/07/2025 - 11:00 - 11:50
Location: 
MPIM Lecture Hall

The construction and estimation of appropriate cubic moments of $L$-functions in small families
has been responsible for the strongest-known bounds for degree $2$ automorphic $L$-functions.
The Weyl bound for all Dirichlet $L$-functions is a consequence of this line of work. In previous
work with Petrow, we constructed families of twisted $L$-functions which may be interpreted as
capturing the $L$-functions whose underlying automorphic representation is everywhere principal

Quantitative equidistribution and Wasserstein distance

Posted in
Speaker: 
Emmanuel Kowalski
Affiliation: 
ETH Zurich
Date: 
Tue, 22/07/2025 - 14:00 - 14:50
Location: 
MPIM Lecture Hall

(Joint work with T. Untrau) Many equidistribution theorems in number theory are proved by means
of the Weyl Criterion and quantitative bounds for $L$-functions or related quantities. It is natural to
want to translate these statements into quantitative equidistribution results in terms of distances
between probability measures. Wasserstein metrics provide an intrinsic and highly flexible framework
for such statements. The talk will survey the underlying definitions and give examples of applications,

A generalization of Tatuzawa's theorem to Rankin Selberg L-functions

Posted in
Speaker: 
Gergely Harcos
Affiliation: 
Alfréd Rényi Institute of Mathematics
Date: 
Tue, 22/07/2025 - 15:00 - 15:50
Location: 
MPIM Lecture Hall

In 2023, Jesse Thorner and I established a new zero-free region for all $GL(1)$-twists of $GL(m) \times GL(n)$ RankinSelberg $L$-functions,
generalizing Siegel's celebrated work on Dirichlet $L$-functions. In the talk, I will discuss our recent strengthening of this result, which generalizes
Tatuzawa's refinement of Siegel's theorem.

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