| Date | Place/Event | Title | Notes |
| 5-9/12/2011 | University of Copenhagen | Lectures on Modular Galois Representations Modulo Prime Powers | Extended lecture notes |
| 21/03/2011 | Universität Magdeburg | Was Modulformen uns über Zahlentheorie lehren - der unverzweigte Fall | |
| 17/03/2011 | CIRM, AGCT 13 | On modular Galois representations modulo prime powers | |
| 21/02/2011 | Aachen, Erste Jahrestagung des SPP 1489 | Die Serresche Modularitätsvermutung und Computer-Algebra | |
| 20/01/2011 | Université du Luxembourg | Galois Representations in Theory and Computation | |
| 29/11/2010 | Paris, Séminaire de théorie des nombres de Jussieu | Sur les représentations galoisiennes de poids un | |
| 25/11/2010 | Lyon | Sur les représentations galoisiennes de poids un | |
| 13/08/2010 | Essen, GTEM-Day | Galois Representations and the Inverse Galois Problem | |
| 14/07/2010 | Paderborn | Was Modulformen uns über Zahlentheorie lehren - der unverzweigte Fall | |
| 09/07/2010 | CRM Barcelona, Modularity Conference | On Galois Representations of Weight One | |
| 02/06/2010 | Essen, Verleihung des Gottschalk-Diederich-Baedeker-Preises | Was Hecke uns über Galois lehrt. | [Video presentation.] |
| 01/06/2010 | Essen, Mathematische Miniaturen II | Modulformen in Zahlentheorie und Geometrie - vom Vierquadratesatz zum letzten Satz von Fermat - | [Video presentation.] |
| 21/05/2010 | Goethe-Universität Frankfurt | Was Modulformen uns über Zahlentheorie lehren - der unverzweigte Fall | |
| 18/05/2010 | Leuven, GTEM Workshop on Compuational Number Theory and Geometry | On Galois Representations of Weight One | |
| 28/01/2009 | Essen, Forschungsseminar on the Eigencurve | Properties of the Eigencurve | [Notes.] |
| 11/12/2009 | Uludag University, Bursa | Computational Aspects of Serre's Modularity Conjecture | |
| 30/11/2009 | Luminy, Théorie des nombres et applications | Asymptotic behaviour of arithmetic properties of coefficients of modular forms | [Video presentation.] |
| 16/11/2009 | Copenhagen | Computing congruences of modular forms modulo prime powers | [Video Presentation.] |
| 07/09/2009 | Third Annual GTEM Conference, Warwick | Computing congruences of modular forms modulo prime powers | [Video Presentation.] |
| 17/07/2009 | Regensburg, Seminar der Forschergruppe | Modulformen und das inverse Galois-Problem | [Notes on request.] |
| 23/04/2009 | Essen, IEM, Beiratskolloquium | Zur Asymptotik von Modulformen - Wolken und deren Grenzen | [Video presentation.] |
| 23/04/2009 | Essen, Schulstunde zum Girls' Day | Zahlen und das Hüten von Geheimnissen | [Material.] |
| 03/04/2009 | Luminy, Arithmétique, géométrie, cryptographie et théorie des codes (AGCT) | Computing congruences of modular forms modulo prime powers | [Video presentation.] |
| 27/03/2009 | Luminy, ESF Exploratory Workshop on CURVES, CODING THEORY, AND CRYPTOGRAPHY | Computing (with) Modular Forms | [Video presentation.] |
| 11/03/2009 | Clermont-Ferrand | Sur la multiplicité des représentations galoisiennes de poids un | [Notes on request.] |
| 10/03/2009 | Clermont-Ferrand | Quelques questions asymptotiques pour les formes modulaires | [Notes and video presentation on request.] |
| 22/01/2009 | Essen, Forschungsseminar on p-adic Galois representations | Semi-stable representations and filtered (phi,N)-modules | [Notes.] |
| 19/12/2008 | Barcelona | One element generation of the coefficient field of a newform | [Notes and video presentation on request.] |
| 15/12/2008 | Leiden | A new result in inverse Galois theory using modular forms | [Notes on request.] |
| 13/11/2008 | Poznan | Modular Forms in Inverse Galois Theory | [Notes on request.] |
| 06/11/2008 | Besançon | Formes modulaires en théorie de Galois inverse | [Notes on request.] |
| 06/11/2008 | Besançon | Sur les multiplicités de représentations galoisiennes de poids un | [Notes on request.] |
| 26/08/2008 | Southampton | Serre's Modularity Conjecture - an Explicit Cohomological Description | [Notes on request.] |
| 17/07/2008 | Essen, Forschungsseminar on Quaternion Algebras | The Galois Representation Attached to a Hilbert Modular Form | [Notes.] |
| 18/06/2008 | Essen, IEM | Around coefficient fields of families of modular forms | [Notes on request.] |
| 14/06/2008 | Essen, Tag der Mathmematik | Über das Hüten von Geheimnissen (Populärer Vortrag) | [Video presentation.] |
| 04/06/2008 | Essen, Kleine Form | Zahlentheorie und Geometrie: alltäglich?! (Populärer Vortrag) | [Video presentation.] |
| 27/05/2008 | Universität Kassel | Modulformen in der inversen Galois-Theorie | [Notes on request.] |
| 14/05/2008 | Universität Düsseldorf | Modular Forms in Inverse Galois Theory | [Notes on request.] |
| 08/05/2008 | Universität Hannover | Anwendung von Modulformen in inverser Galois-Theorie | [Notes on request.] |
| 20/02/2008 | Bristol | On the generation of the coefficient field of a modular form | [Notes and video presentation on request.] |
| 31/02/2008 | IML, Marseille-Luminy, Arithmétique et théorie de l'information | Sur les coefficients de formes modulaires | [Notes and video presentation on request.] |
| 22/01/2008 | Essen, IEM, Workshop Arithmetic Geometry | On the coefficient field of a newform | [Notes and video presentation on request.] |
| 06/11/2007 | Berlin, Humboldt-Universität | On the generation of the coefficient field of a newform by one Hecke eigenvalue | [Notes on request.] |
| 21/09/2007 | Leiden, Lorentz Center, Workshop "Galois Theory and Explicit Methods" | Modular Forms in Inverse Galois Theory | [Notes on request.] |
| 14/06/2007 | Essen, Forschungsseminar zur Einführung in die Theorie der automorphen Formen | Lokale L-Funktionen, der lokale Führer und ein Resümee des Zusammenhangs zwischen Neuformen und kuspidalen automorphen Darstellungen | [Rough notes.] |
| 06/06/2007 | Banff, Workshop Modular Forms: Arithmetic and Computation | Multiplicities of Galois Representations of Weight 1 | [Notes typed by Bjorn Poonen.] |
| 26/04/2007 | Essen, IEM, Beiratskolloquium | Asymptotische Aspekte der Arithmetik von Modulformen | [Video presentation on request.] |
| 17/01/2007 | Köln, Seminar Aachen-Köln-Lille-Siegen | Inverse Galois Theory Via Modular Representations | [Notes on request.] |
| 15/11/2006 | Regensburg, Tag der Naturwissenschaften | Kryptographie mit elliptischen Kurven | [Video presentation.] |
| 11/10/2006 | Conference on Modular Forms, Schiermonnikoog. | Multiplicity Two | [Notes on request.] |
| 08/2006 | Berkeley, Summer Workshop on Computational Number Theory at the MSRI | Series of four lectures on: Modular Forms mod p | [Notes.] |
| 07/2006 | Regensburg, Oberseminar Euler-Systeme | Euler-Systeme und rationale elliptische Kurven | [Notes on request.] |
| 06/07/2006 | IEM, Essen | Modulformen in expliziter Zahlentheorie | [Notes on request.] |
| 11/04/2006 | Lausanne | Symboles modulaires et calcul de formes modulaires | [Notes.] |
| 25/01/2006 | Regensburg, Oberseminar zu Néron-Modellen | Verträglichkeit von Néron-Modellen unter Basiswechsel und Isogenien | [Notes.] |
| 10/10/2005 | Strasbourg | Formes et symboles modulaires mod p | [Video presentation.] |
| 06/09/2005 | Leiden, Lunch Colloquium "This week's discoveries" of the Faculty of Science | Modular Forms: Numbers and Geometry | |
| 02/09/2005 | Leiden, Intercity Number Theory Seminar | Modular Forms of Weight One Over Finite Fields | [Video presentation on request.] |
| 24/05/2005 | Essen | Mod p Modular Forms and Modular Symbols | [Video presentation on request.] |
| 10/05/2005 | Barcelona | Mod p Modular Forms and Galois Representations | |
| 28/01/2005 | Regensburg | Katz-Modulformen, Modulsymbole und die Serre-Vermutung | [Video presentation on request.] |
| 08/12/2004 | Clausthal | Modulformen, Heckeoperatoren und Anwendungen in der Zahlentheorie | [Video presentation on request.] |
| 11/2004 | Banff, Workshop on Explicit Methods in Number Theory | Mod p modular symbols | [Slides on request.] |
| 14/09/2004 | Heidelberg, DMV-Jahrestagung | Katz-Modulformen und Dieder-Galoisdarstellungen | [Slides on request.] |
| 14/05/2004 | Leiden, Intercity Number Theory Seminar | Dihedral Galois representations and Katz modular forms | [Video presentation on request.] |
| 30/04/2004 | La Grande Motte, Colloque Jeunes Chercheurs en théorie des nombres | Formes modulaires de Katz et représentations diédrales | [Slides on request.] |
| 18/02/2004 and 17/03/2004 | Leiden, Geometry Seminar | Two talks on: Fontaine's theory | [Notes on request.] |
| 04/01/2004 | Far Hills workshop on L-functions and p-adic cohomology: computational perspectives | Mod p modular forms of weight one and Galois representations: computational and theoretical aspects | [Slides on request.] |
| 10/2003 | Leiden, Number Theory Seminar | Open problems: CM types acting on class groups | [Notes] |
| 26/05/2003 and 02/06/2003 | Leiden, Number Theory Seminar | Two talks on: An explicit adelic description of moduli of elliptic curves and Galois action on CM-points | [Notes.] |
| 6/5/2003 | Kassel, Seminar on Computational Mathematics | Berechnung von Modulformen von Gewicht 1 in positiver Charakteristik | [Slides on request.] |
| 07/03/2003 | Utrecht, Intercity Number Theory Seminar | Computations of weight 1 modular forms over finite fields | [Slides.] |
| 12/2002 and 1/2003 | Leiden, Geometry Seminar | Four talks on: Calculation of characteristic p Katz modular forms of weight 1 | [Notes.] |
| 04/11/2002 | Leiden, Number Theory Seminar | The Lie algebra of an algebraic group | [Notes.] |
Last modification: 9 December 2011.