Seminar Aachen-Köln-Lille-Siegen on Automorphic Forms

In the summer 2003 we, i.e. Jan Bruinier from Köln, Valery Gritsenko from Lille, Aloys Krieg from Aachen and Nils Skoruppa, agreed to start a joint seminar, which should take place four times each year hosted alternately by our home universities, respectively. The original aim was to broaden the platform for our students doing research with us in the field of automorphic forms.

Since then we organized many of these one afternoon workshops with increasing success. Moreover, our seminar gained recognition outside our four universities and usually during our meetings you have the possibility to meet researchers from several other German or French universities or from the Max-Planck institute for Mathematics at Bonn. Accordingly, this seminar is now a platform not only for our students, but, as one may recognize from the names of the speakers, for all researches from the Benelux countries, from Switzerland and Germany and sometimes from outside Europe. The list of all speakers so far, including the posters of the meetings and many snapshots, can be found below.

 

09.10.2013 Aachen

Pieter Moree MPI Bonn The second order behaviour of sums of multiplicative functions Fabien Cléry Siegen Siegel modular forms of genus 2 and level 2 Seyfi Türkelli Western Illinois/MPI Lower bounds for the cohomology of Bianchi groups

 

11.06.2013 Köln

A. Raghuram IISER Pune, MPI Bonn The Langlands Program and Special Values of L-functions R. Hill UC London Construction of metaplectic groups M. Mertens Köln Mock Modular Forms and Class Number Relations

 

04.02.2013 Aachen

D. Gehre, A. Henn Aachen Quaternionic Modular Forms with respect to ℚ(-3,-1) K. Maurischat Heidelberg On Meromophic Continuation of Poincaré Series for Low Weight in Genus Two R. Olivetto Köln Fourier coefficients of meromorphic Jacobi forms

 

01.10.2012 Lille

V. Gritsenko Lille Exceptional Arnold singularities and their automorphic discriminants P. Vanhove IHES Automorphic representations of small nilpotent orbits and BPS states P. Solé Paristech The secrecy gain of unimodular even lattices

 

20.06.2012 Bonn

Matthias Gaberdiel Zürich Mathieu Moonshine Lassina Dembélé Warwick/MPI Some examples of abelian surfaces with everywhere good reduction Anantharam Raghuram Oklahoma/MPI Arithmetic properties of automorphic L-functions

 

14.03.2012 Köln

Nikolaos Diamantis Nottingham Multiple Dirichlet series and second order automorphic forms Jörg Jahnel Siegen K3 Surfaces and their Picard ranks Kathrin Bringmann Köln Kac-Wakimoto characters and almost holomorphic modular forms

 

30.11.2011 Lille

Fabien Clery University of Amsterdam Vector-valued Picard modular forms Mladen Dimitrov University of Lille Modular symbols and p-adic L-functions for GL(2) over totally real fields Nils Skoruppa Siegen An arithmetic theory of Jacobi forms over number fields

 

28.09.2011 Aachen

Christine Bachoc Bordeaux Lower bounds for the measurable chromatic number of Euclidean space Valentin Blomer Göttingen Counting rational points on a cubic surface Jan Bruinier Darmstadt On the converse theorem for Borcherds products

 

08.06.2011 Bonn

M. Möller Frankfurt Kobayashi geodesics and their modular forms N. Scheithauer Darmstadt Some constructions of modular forms for the Weil representation and applications R. Schulze-Pillot Saarbrücken Petersson norms of Yoshida liftings and congruences

 

28.03.2011 Köln

Adrian Diaconu Durham Trace Formulas, character sums, and multiple Dirichlet series Masha Vlasenko Bonn Nahm's equations and modular forms Sander Zwegers Köln Some indefinite theta functions

 

08.12.2010 Lille

Hisa-aki Kawamura Grenoble/Hokkaido On some constructions of p-adic families of Siegel modular forms Pierre Vanhove IHES Automorphic properties of string theory amplitudes in various dimensions Jean-Claude Belfiore Paris Analysis of Lattice Coding for the Wiretap Channel with Gaussian noise

 

29.09.2010 Siegen

Jens Funke Durham Spectacle cycles and half integral weight modular forms Nils Skoruppa Siegen Jacobi forms of singular and critical weight and lattice Index on the full modular group Hiroki Aoki Tokyo On the Jacobi triple product identity and Borcherds products

 

05.05.2010 Köln

Don Zagier MPI Bonn Teichmüller curves and their modular forms Winfried Kohnen Heidelberg Generalized modular functions and their characters Martin Raum MPI Bonn A computational approach to the Boecherer conjecture

 

03.03.2010 Aachen

Jonas Bergström Amsterdam/MPI Bonn Moduli of abelian varieties and congruences between Siegel modular forms Siegfried Böcherer Mannheim Witt operators of squarefree level and small weights Eberhard Freitag Heidelberg Some Siegel Calabi-Yau-3-manifolds

 

09.12.2009 Lille

Gregory Sankaran Bath Commutators in orthogonal groups Michael Harris Paris 7 On the Sato-Tate Conjecture Sameer Murthy Paris 6 Quantum black holes and mock modular forms

 

30.09.2009 Siegen

Fredrik Strömberg Darmstadt On computational aspects of vector-valued modular forms for the Weil representation Ben Kane Köln Equidistribution of Heegner Points and Quadratic Forms Ulf Kühn Hamburg Scattering constants and Neron-Tate heights

 

17.04.2009 Utrecht

Matthias Schuett Copenhagen K3 surfaces and modular forms Gerard van der Geer Amsterdam Siegel modular forms of low genera Don Zagier Paris On a U(3,1)-automorphic form of Ferapontov-Odesskii

 

28.01.2009 Aachen

Olav Richter Denton,Aachen Jacobi forms over complex quadratic fields via the cubic Casimir operator Lynne Walling Bristol Half-integral weight Siegel modular forms, Hecke Operators and theta series Jan Hendrik Bruinier Darmstadt Faltings heights of CM cycles and derivatives of L-functions

 

12.11.2008 Lille

Kenji Iohara Lyon The Appell elliptic function and Lie superalgebras Benoit Grandpierre Lille A new construction of the Igusa form of weight 35 and other reflective modular forms associated to the Borcherds function $\Phi_12$ Atish Dabholkar Paris 6 Siegel Forms and Black Holes

 

18.06.2008 Siegen

Nils-Peter Skoruppa Siegen On the computation of modular forms of half integral weight Hiroki Aoki Tokyo/Siegen On vector valued Siegel modular forms Aloys Krieg Aachen Fixpunkte von Möbiustransformationen über den Quaternionen

 

23.04.2008 Bonn

Valery Gritsenko Lille/MPI Bonn Quasi pull-back of the Borcherds function $\Phi_12$ and the Zagier L-function $L(s, \Delta)$ Viacheslav Spiridonov LTPh/Dubna/MPI Bonn Elliptic gamma functions and elliptic hypergeometric integrals Kathrin Bringmann Minneapolis/MPI Bonn Asymptotic and exact formulas for weak Maass forms

 

12.03.2008 Aachen

Soeren Krausshar Leuven k-hypermonogenic automorphic forms and their relation to Maass wave forms Jan Bruinier Darmstadt Heegner divisors, L-functions and harmonic weak Maass forms Jonathan Hanke Duke/MPI Bonn Finiteness Theorem and Representing Integers by Quadratic Forms

 

21.11.2007 Lille

Valery Gritsenko Lille On an automorphic problem of K.Saito Michael Harris Paris VII On the Sato-Tate conjecture Boris Venkov St.Petersburg/Aachen Perfect lattices and spherical designs

 

06.06.2007 Siegen

Gabriele Nebe Aachen Codes and invariant theory Najib Ouled Azaiez Max-Planck Bonn The algebra of restrictions of Hilbert modular forms Yasuo Ohno Osaka, Max-Planck Bonn On relations among non-strict multiple zeta values

 

04.04.2007 Aachen

Nicole Raulf Lille Fundamental discriminants and the asymptotics of the corresponding class numbers Kilian Kilger Heidelberg Periods of cusp forms for \Gamma_0(2) and an application Fredrik Strömberg Clausthal Hecke operators and Maass wave forms on PSL(2,Z) with integer weight and non-trivial multiplier system

 

17.01.2007 Köln

Bas Edixhoven Leiden On the computation of coefficients of modular forms Gabor Wiese Regensburg Inverse Galois theory via modular representations Bernhard Heim MPI Bonn Ramanujan type congruences and Jacobi forms

 

15.11.2006 Lille

Renaud Coulangeon Bordeaux Minima of Epstein zeta functions and spherical designs. Gerard van der Geer Amsterdam Siegel modular forms of degree 2 and Harder's conjecture. Don Zagier Paris Various realizations and applications of the principal series for SL(2,R)

 

31.05.2006 Köln

Siegfried Böcherer Mannheim Siegel modular forms modulo p Sebastian Mayer Aachen Hilbert modular forms for Q(\sqrt{5}), Q(\sqrt{13}), and Q(\sqrt{17}) Eberhard Freitag Heidelberg Point configurations and modular forms

 

26.04.2006 Aachen

B. Ramakrishnan HRI Allahabad, IHES Paris On a conjecture of Zagier Nils Scheithauer Heidelberg The Weil representation of SL(2,Z) and some applications Rainer Schulze-Pillot Saarbruecken Jacquet's conjecture and invariant linear forms

 

08.02.2006 Siegen

Yumiko Hironaka Tokyo, Mannheim Linear Independence of Local Densities Shabnam Kadir Oxford, Hannover Arithmetic Mirror Symmetry and Siegel Modular Forms Valery Gritsenko Lille Thetablocks I: Application to Siegel Modular Varieties Nils-Peter Skoruppa Siegen Thetablocks II: Building Jacobi Forms from Quarks

 

09.11.2005 Lille

Alexei Pantchichkine Grenoble Triple products of Coleman's families (a joint work with S.Boecherer) Ingo Kloecker Aachen Modular Forms for the Orthogonal Group O(2,5) Valery Gritsenko Lille Kodaira dimension of the moduli spaces of K3 surfaces, the automorphic aspects

 

29.06.2005 Aachen

Audrey Terras UC San Diego What are zeta functions of graphs and what are they good for? William Duke UC Los Angeles Asymptotics of traces of j-values Harold Stark UC San Diego Class-Numbers of CM Fields

 

08.06.2005 Köln

Jürg Kramer HU Berlin Sup-norm bounds of automorphic forms Tobias Mühlenbruch Clausthal Hecke operators for period functions Ulf Kühn HU Berlin On the arithmetic geometry associated with Hecke's Eisenstein series of weight 2

 

13.04.2005 Aachen

Nicole Raulf MPI Bonn Hecke operators and quadratic forms Rolf Berndt Hamburg Representations of the Jacobi group and Marsden Weinstein reduction Nils Scheithauer Heidelberg On the classification of automorphic products and generalized Kac-Moody algebras

 

12.01.2005 Siegen

Tomoyoshi Ibukiyama Osaka Conjecture of a Shimura correspondence for Siegel Modular Forms of Degree Two Arnaud Jehanne Bordeaux/Siegen Modular forms of weight 1 Winfried Kohnen Heidelberg On the number of representations of an integer as a sum of an even number of squares

 

08.12.2004 Lille

Gabriele Nebe Aachen Explicit actions of Hecke operators on certain genera of lattices Aloys Krieg Aachen Theta Series over the Hurwitz Quaternions Don Zagier Paris Modular forms, Mock modular forms and dilogarithms

 

14.07.2004 Köln

Eberhard Freitag Heidelberg Modular varieties of low dimension Winfried Kohnen Heidelberg Estimating Fourier coefficients of Siegel modular forms Jens Funke Las Cruces Cycles with local coefficients and vector valued Siegel modular forms

 

12.05.2004 Lille

Aloys Krieg Aachen The Graded Ring of Hermitian Modular Forms of Degree 2 over Q(\sqrt{-2}) Julien Puydt Grenoble Special values of the L-functions of modular forms Nils-Peter Skoruppa Siegen Computing elliptic modular forms - a howto, possible projects and perspectives

 

21.01.2004 Siegen

Shuichi Hayashida Osaka Siegel modular forms of half integral weight and skew holomorphic Jacobi forms Winfried Kohnen Heidelberg Maass-space in higher genus Kathrin Bringmann Heidelberg Abschätzung von Fourier-Koeffizienten Siegelscher Spitzenformen

 

19.11.2003 Aachen

Jan Bruinier Cologne On two geometric theta lifts Sören Kraushaar Gent Monogenic automorphic forms for principal congruence subgroups of the hypercomplex modular group Özlem Imamoglu Zürich, Santa Barbara Lattice points and Dirichlet series

 

 

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