Mathematisches Institut

Göttingen-Hannover Number Theory Workshop


25th meeting

Göttingen, 4th December 2025 (Hörsaal 4)

  • 3:30pm Vivian Kuperberg (ETHZ and IST Austria)
    • Prime truncations
    Abstract: The prime number 357686312646216567629137 is notable in some recreational math circles because of the unusual property that it remains prime successively on removing the left digit until there are no remaining digits. In this talk we will explore the more general phenomena of prime truncations of integers and irreducible truncations of polynomials, examining the distribution of these prime truncations. Joint work with Matilde Lalín.

  • 4:30om Coffee break

  • 5:00pm Ben Heuer (Hannover)
    • p-adic non-abelian Hodge theory and its arithmetic application
    Abstract: p-adic Hodge theory compares different cohomology theories for varieties over p-adic fields. Without assuming any background in this area, this talk will give an introduction to p-adic non-abelian Hodge theory, which is about comparing different categories of coefficients for such cohomology theories, for example local systems and Higgs bundles. I will then discuss arithmetic applications.

    24th meeting

    Göttingen, 19th May 2025 (Sitzungszimmer)

  • Maxim Gerspach (KTH Stockholm)
    • The third moment of the logarithm of the Riemann zeta function
  • Gunther Cornelissen (University of Utrecht)
    • Zeros of Eisenstein series for congruence groups

    23th meeting

    Hannover, 23rd January 2025

  • Zhizhong Huang (CAS, Beijing)
    • Ternary quadratic forms and the circle method
  • Fabian Gundlach (Paderborn)
    • Asymptotics of extensions of simple Q-algebras

    22nd meeting

    Göttingen, 2nd July 2024

  • Riccardo Pengo (Hannover University)
    • Diophantine properties of special values of L-functions
  • Kannan Soundararajan (Stanford University)
    • Covering integers by binary quadratic forms

    21st meeting

    Göttingen, 20th November 2023

  • Stephanie Chan (ISTA)
    Integral points in families of elliptic curves
  • Joerg Bruedern (Universität Göttingen)
    Various problems of Waring's type

    20th meeting

    Hannover, 14th June 2023

  • Jean-Louis Colliot-Thélène (CNRS / Université Paris-Saclay)
    Arithmetic upon intersection of two quadrics
  • Leonhard Hochfilzer (Universität Göttingen)
    Diagonal cubic forms over Fq(t)

    19th meeting

    Online, 30th May 2022

  • Tim Browning (IST Austria)
    Rational points on Fano varieties: freeness and counting
  • Rainer Dietmann (London Royal Holloway)
    Recent work on van der Waerden’s conjecture

    18th meeting

    Online, 12 July 2021

  • Philipp Habegger (Universität Basel)
    Uniformity for the Number of Rational Points on a Curve, Part I
  • Ziyang Gao (CNRS and Institut de Mathématiques de Jussieu-Paris Rive Gauche)
    Uniformity for the Number of Rational Points on a Curve, Part II

    • 17th meeting

    Online, 14 June 2021

  • Trevor Wooley (Purdue University)
    My PhD (thesis) problem
  • Masahiro Nakahara (University of Washington)
    Elliptic divisibility sequences and the elliptic sieve

    • 16th meeting

    Göttingen, 22 January 2020

  • Valentin Blomer (Bonn):
    A symplectic restriction problem
  • Kannan Soundararajan (Stanford)

    15th meeting

    Göttingen, 14 June 2019

  • Steffen Müller (Groningen):
    Quadratic Chabauty and the split Cartan modular curve of level 13
  • Jörg Jahnel (Siegen):
    On integral points on open degree four del Pezzo surfaces

    • 14th meeting

    Hannover, 21 January 2019

  • Damaris Schindler (Utrecht):
    Diophantine inequalities for ternary diagonal forms
  • Kevin Destagnol (IST Austria):
    Rational points and prime values of polynomials

    • 13th meeting

    Göttingen, 15 January 2018

  • Jan-Christoph Schlage-Puchta (Rostock):
    The number of normal subgroups in finitely generated groups
  • Evelina Viada (Göttingen):
    Explicit methods for torsion anomalous intersections

    • 12th meeting

    Göttingen, 13 November 2017

  • Florian Wilsch (Hannover):
    Counting integral points on a certain log Fano threefold
  • Raphael Steiner (Bristol):
    Equidistribution of rational points on shrinking sets of S3:
    A juxtaposition of an automorphic and a circle method approach

    • 11th meeting

    Göttingen, 2 June 2017

  • Valentin Blomer (Göttingen):
    Spectral reciprocity and moments of L-functions
  • Matthias Schütt (Hannover):
    Elliptic surfaces in geometry and arithmetic

    • 10th meeting

    Hannover, 22 January 2017

  • Davide Lombardo (Hannover):
    Reductions of points of infinite order on algebraic groups
  • Valentin Blomer (Göttingen):
    The Manin-Peyre formula for a certain biprojective threefold
  • Ulrich Derenthal (Hannover):
    Manin's conjecture for a family of singular quartic del Pezzo surfaces

    • 9th meeting

    Göttingen, 2 November 2016

  • Valentin Blomer (Göttingen):
    Higher order divisor problems
  • Giuliano Gagliardi (Hannover):
    Manin's conjecture for some spherical threefolds
  • Harald Helfgott (Göttingen):
    The sieve of Eratosthenes in less space

    • 8th meeting

    Göttingen, 6 June 2016

  • Maryna Viazovska (Berlin):
    The sphere packing problem in dimensions 8 and 24
  • Alisa Sedunova (Göttingen):
    On the Bombieri-Pila method over function fields
  • Emmanuel Kowalski (Zürich):
    Mixing algebra and analysis over finite fields



    • 7th meeting

    Hannover, 8 March 2016

  • Christopher Frei (Graz):
    The Hasse norm principle for abelian extensions
  • Kathrin Bringmann (Köln):
    Fourier coefficients of meromorphic modular forms
  • Michael Stoll (Bayreuth):
    The Generalized Fermat Equation x2 + y3 = z11

    • 6th meeting

    Göttingen, 1 February 2016

  • Lilian Matthiesen (Hannover):
    Evaluating certain correlations of eigenvalues of holomorphic cusp forms
  • Lasse Grimmelt (Göttingen):
    Representation of squares by cubic forms
  • Jörg Brüdern (Göttingen):
    Differenced cubes and diophantine approximation

    • 5th meeting

    Göttingen, 7 December 2015

  • Jim Parks (Hannover):
    An asymptotic result for the number of amicable pairs of elliptic curves on average
  • Berke Topacogullari (Göttingen):
    On a certain additive divisor problem
  • Jörg Brüdern (Göttingen):
    Zhao's trick

    • 4th meeting

    Hannover, 9 July 2015

  • Lilian Matthiesen (Hannover)
    Multiplicative functions and nilsequences
  • Jörg Brüdern (Göttingen):
    Sums of two like powers
  • Yonatan Harpaz (École Normale Superieure):
    The Hasse principle for generalized Kummer varieties

    • 3rd meeting

    Göttingen, 25 April 2015

  • Julia Brandes (Göttingen):
    Simultaneous additive equations: repeated and differing degrees
  • Dan Loughran (Hannover):
    The Hasse principle for lines on cubic surfaces
  • Vita Kala (Göttingen):
    Number fields without n-ary universal quadratic forms

    • 2nd meeting

    Göttingen, 6 February 2015

  • Marta Pieropan (Hannover):
    Rational points as lattice points
  • Berke Topacogullari (Göttingen):
    The shifted convolution of divisor functions
  • Olivier Robert (St. Etienne):
    On the abc conjecture and nuclear numbers

    • 1st meeting

    Göttingen, 21 November 2014

  • Péter Maga (Göttingen):
    Subconvexity for supnorms of automorphic forms on PGL(n)
  • Christopher Frei (Hannover):
    Forms of differing degrees over number fields
  • Oscar Marmon (Göttingen):
    Random Thue and Fermat equations