- 03/2025 - Diophantine and Rationality Problems, Institute of Mathematics and Informatics at the Bulgarian Academy of Sciences, Sofia
- 11/2024 - Intercity Number Theory Seminar, Groningen
- 10/2024 - Birational Geometry and Number Theory, ICMS, Edinburgh
- 08/2024 - Geometry Over Non-Closed Fields, Schloss Elmau
- 05/2024 - Arithmetic Geometry, Group Actions and Rationality Problems, Simons Foundation, New York
- 04/2024 - IAS, Mathematical Conversations
- 03/2024 - Degree d points on algebraic surfaces, American Institute of Mathematics, Pasadena
- 03/2024 - Rutgers University, Number Theory Seminar
- 02/2024 - Montreal, Quebec-Vermont Number Theory Seminar
- 02/2024 - MIT, Number Theory Seminar
- 02/2024 - Princeton University, Algebraic Geometry Seminar
- 02/2024 - Stony Brook University, Algebraic Geometry Seminar
- 01/2024 - Princeton University/IAS, Number Theory Seminar
- 10/2023 - NYU, Joint Columbia-CUNY-NYU Number Theory Seminar
- 03/2022 - Rational Points 2022, Schloss Schney
- 03/2022 - IST Austria, Algebraic Geometry & Number Theory Seminar
- 09/2021 - DMV-ÖMG Jahrestagung 2021, Section Algebra, Algebraic Geometry & Number Theory, Passau (online)
- 06/2021 - Universität Würzburg, Würzburger Mathematisches Kolloquium (online)
- 04/2021 - Institut Mittag-Leffler, Number Theory Program (online)
- 09/2020 - DMV-Jahrestagung, Section Algebra, Algebraic Geometry and Number Theory, TU Chemnitz (online)
- 01/2020 - Universität Oldenburg, Oberseminar Algebra/Geometrie
- 07/2019 - del Pezzo surfaces and Fano varieties, Universität Düsseldorf
- 07/2019 - Rational Points 2019, Schloss Schney
- 07/2018 - Rational Points on Schiermonnikoog
- 06/2018 - University of Oxford, Number Theory Seminar
- 05/2018 - Birational Geometry and Arithmetic, ICERM
- 04/2018 - Number Theory Seminar, University of Manchester
- 02/2018 - Rational Points in Bristol
- 09/2017 - EPFL, Algebra and Number Theory Seminar
- 07/2017 - Rational Points 2017, Schloss Schney
- 04/2017 - Intercity Number Theory Seminar, Groningen
- 03/2017 - University of Warwick, Algebraic Geometry Seminar
- 01/2017 - Göttingen-Hannover Number Theory Workshop, Hannover
- 01/2017 - Adam Mickiewicz University, Poznań, Seminarium z Algebry, Geometrii i Arytmetyki
- 11/2016 - N-cube-days V, Chalmers University, Göteborg
- 09/2016 - Geometric and Analytic Number Theory, ETH Zürich
- 01/2016 - Conference on Algebraic Number Theory, Tsinghua Sanya International Mathematics Forum
- 01/2016 - Capital Normal University, Beijing
- 11/2015 - Universität Bielefeld
- 09/2015 - Jahrestagung SPP 1489, Osnabrück
- 06/2015 - Rational Points 2015, Schloss Schney
- 06/2015 - Quantitative arithmetic geometry, Institut Mittag-Leffler
- 06/2015 - Arithmetic geometry, Chow groups and rational points, Steklov Mathematical Institute, St. Petersburg
- 06/2015 - Mini-course on Arithmetic Geometry, Universität Basel
- 05/2015 - Rational Points - Pontos Racionais, IMPA
- 05/2015 - Irish Geometry Conference 2015, Mary Immaculate College, Limerick
- 02/2015 - Universität Oldenburg, Mathematisches Kolloquium und Oberseminar Algebra/Geometrie
- 12/2014 - Universität Duisburg-Essen, Oberseminar Algebraische Geometrie und Arithmetik
- 06/2014 - Universität Bielefeld, Arithmetic Geometry Seminar
- 06/2014 - Universität Hannover, Antrittsvorlesung
- 04/2014 - Universität Göttingen, Mathematische Gesellschaft
- 03/2014 - Jahrestagung SPP 1489, Bad Boll
- 12/2013 - Universität Zürich, Oberseminar Algebraische Geometrie
- 09/2013 - Workshop Rencontres de théorie analytique et élémentaire des nombres, Institut Henri Poincaré, Paris
- 09/2013 - Orsay, Séminaire d'Arithmétique et de Géométrie Algébrique
- 07/2013 - Workshop Rational Points 2013, Schloss Thurnau
- 07/2013 - Mainz, SFB-Kolloquium
- 06/2013 - Erlangen, Emmy Noether Seminar
- 05/2013 - Workshop Rational Points - Geometric, Analytic and Explicit Approaches, Warwick
- 05/2013 - Workshop North German Algebraic Geometry Seminar, Hannover
- 04/2013 - Conference of the program Arithmetic and Geometry, Hausdorff Research Institute for Mathematics, Bonn
- 02/2013 - Institut Henri Poincaré, Paris, Séminaire Variétés Rationnelles
- 10/2012 - Colloque Points entier - Points rationnels, Institut Fourier, Grenoble
- 10/2012 - Workshop Computing in Arithmetic Geometry, MSRI
- 09/2012 - ERC Research Period on Diophantine Geometry, Centro di Ricerca Matematica Ennio De Giorgi, Pisa
- 09/2012 - Workshop Cohomological Methods in Arithmetic Geometry, University of Zurich (part of Rational Points and Algebraic Cycles, CIB, EPFL)
- 06/2012 - Workshop Analytic methods for diophantine problems, Göttingen
- 05/2012 - Graz, Zahlentheoriekolloquium
- 12/2011 - Jagiellonen-Universität Krakau, Seminar Analytic and Algebraic Geometry
- 09/2011 - DMV-Jahrestagung, Sektion "Arithmetische Geometrie und Zahlentheorie", Köln
- 07/2011 - Sino-French summer institute on arithmetic geometry, Chern Institute of Mathematics, Tianjin
- 05/2011 - Bayreuth, Mathematisches Kolloquium
- 02/2011 - Workshop Arithmetic and Motivic Algebraic Geometry, Regensburg
- 01/2011 - LMU München, Mathematisches Kolloquium
- 01/2011 - Workshop Torsors: theory and applications, ICMS, Edinburgh
- 01/2011 - Workshop Density of Rational and Integral Points, Ein Gedi
- 12/2010 - Regensburg, Mathematisches Kolloquium
- 11/2010 - Heidelberg, Hauptseminar Algebra und Zahlentheorie
- 04/2010 - Workshop Analytic Number Theory, Göttingen
- 03/2010 - Basel, Seminar Algebra & Topologie
- 01/2010 - Augsburg, Oberseminar
- 10/2009 - Strasbourg, Joint Seminar in Algebraic and Complex Geometry, Freiburg-Nancy-Strasbourg
- 07/2009 - Workshop Cox rings, Universität Tübingen
- 04/2009 - Universität Bonn / Max-Planck-Institut für Mathematik, Seminar Algebraic Geometry
- 04/2009 - UC Berkeley, Number Theory Seminar
- 04/2009 - MSRI, Berkeley
- 10/2008 - New York University, Joint Columbia-CUNY-NYU Number Theory Seminar
- 09/2008 - Princeton University, Algebraic Geometry Seminar
- 05/2008 - ETH Zürich
- 02/2008 - University of Oxford, Number Theory Seminar
- 02/2008 - University of Bristol, Heilbronn Seminar
- 10/2007 - ETH Zürich, Number Theory Seminar
- 07/2007 - Conference Rational Points on Curves and Higher-Dimensional Varieties, Bremen
- 07/2007 - Conference Diophantine Equations Via Analytic Number Theory, Bristol
- 02/2007 - Universität Göttingen, Kolloquium
- 12/2006 - Zurich Graduate Colloquium
- 05/2006 - Conference Analytic Methods for Diophantine Equations, Banff
- 05/2006 - MSRI, Berkeley
- 11/2005 - Universität Hannover, Seminar on Algebraic and Arithmetic Geometry
- 10/2005 - Universität Tübingen
- 02/2005 - Rice University, Houston, Computational Algebraic Geometry Seminar
- 02/2005 - Rice University, Houston, Geometry and Analysis Seminar
- 08/2004 - DMV-Studierendenkonferenz, Heidelberg
- 03/2004 - University of Oxford, Number Theory Seminar