- Iasi: The Algebraic and Arithmetic Geometry Week in Iasi (AAG 2025), .9.25
- Edinburgh: Recent Advances in Anabelian Geometry and Related Topics, ..25
- Kyoto: Intercity Seminar on Arakelov Geometry: Post Lie algebras and multiple (q-)zeta values, 10.9.24
- Hamburg: Beyond multiple zeta values: Post Lie algebras with application to multiple (q-)zeta values, 28.8.24
- Aarhus: Nordic Number theory Network Days XVIII: Recent developments in multiple q-zeta values, 11.7.23
- Madrid: Arakelov theory intercity seminar: A survey on multiple q-zeta values, 16.9.22
- Regensburg: Arakelov theory intercity seminar: Multiple q-zeta values and Hilbert schemes of points on a surface, 10.9.21
- Kyushu, MZV-online seminar: Reshaping and restructuring the proofs of two theorems on double zeta values due to Gangl-Kaneko-Zagier, 25.5.2020
- Kyoto, RIMS: Various Aspects of Multiple Zeta Values: On exotic relations for double q-zeta values, 21.11.2019
- Montreal, CRM Workshop on Expansions, Lie Algebras, and Invariants: Lie-algebras associated to multiple q-zeta values, 9.7.2019
- Bayreuth, Oberseminar Zahlentheorie: Some remarks on double q-zeta values, 24.5.2019
- Köln, Oberseminar Zahlentheorie: Multiple zeta values and q-series, 21.5.2019
- Tirupati, IISER: Students Colloquium: On Euler's formula for zeta(2n), 15.3.2019
- Tirupati, IISER: 3x90min course, Multiple zeta and q-zeta values, 12.-18.3.2019
- Bangalore, ICTS/TIFR: Algebraic and analytical aspects of automorphic forms, Multiple q-zeta values and period polynomials, 7.3.2019
- Bangalore, ICTS/TIFR: Algebraic and analytical aspects of automorphic forms, 4x90min course: Modular forms and multiple q-Zeta values. 27.2-1.3.2019
- Clermont Ferrand, Rencontres du GDR Renormalisation: Multiple q-zeta values and bimoulds, 15.11.2018
- Paris, Institut Henri Poincare, Seminaire de Geometrie et Quantification: Multiple q-zeta values and period polynomials, 11.6.2018
- Tokiyo, Kansai MZV workshop: On the algebra of multiple q-zeta values, 27.5.2018
- Nagoya, Analytic number theory seminar: On generators in depth 4 for multiple q-zeta values, 25.5.2018
- Fukuoka, Kyusu University algebra Seminar: Lie Algebras related to multiple q-zeta values and period polynomials, 17.5.2018
- HU Berlin, Arithmetische Geometrie Seminar: Multiple q-zeta values and period polynomials, 24.4.2018
- Zeuthen, Desy theory seminar: On the algebra of multiple q-Zeta Values, 15.3.2018
- Clermont-Ferrand, Seminaire et Groupe de travail Theorie des Nombres: Multiple q-zeta values and period polynomials, 13.2.2018
- Constanta, Joint Meeting of the German Mathematical Society and the Romanian Mathematical Society: Multiple q-zeta values and period polynomials, 18.9.2017
- Göttingen, Kolloquium der Mathematischen Gesellschaft: On multiple q-zeta values, 1.6.2017
- Bristol, Heilbronn number theory seminar: A geometric interpretation of elements in K_2 of curves, 17.1.2017
- Regensburg, ARAKELOV GEOMETRY - ARCHIMEDEAN AND NON-ARCHIMEDEAN ASPECTS: w^2 on Fermat curves and some super elliptic curves, 8.9.2016
- Essen, Algebra, Geometry and Number Theory Seminar: On multiple q-zeta values, 21.7.2016
- Iasi, Geometric and Combinatorial Methods in Number Theory: On multiple q-zeta values, 28.6.2016
- Oxford, Workshop on IUT Theory of Shinichi Mochizuki: Arithmetic of elliptic curves in general position, 7.12.2015
- Nijmegen, B-Nl meets NoGAGS: A geometric approach to constructing elements of K2 of curves, 12.6.2015
- Hannover, Oberseminar Zahlentheorie und Arithmetische Geometrie: Multiple Eisenstein series and a new class of multiple q-zeta values, 22.4.2015
- Montreal, CRM Workshop on the Kudla Programme: Beyond Kudla's conjectures: Multiple Eisenstein series, 6.4.2015
- Berlin, Seminar mathematische Physik: Multiple Eisenstein series and a new class of multiple q-zeta values, 7.2.2015
- Bayreuth, Kolloquium: Multiple Eisenstein series and a new class of multiple q-zeta values, 22.1.2015
- Copenhagen, Nordic Number-theory Network- Days I: On the generators of a certain algebra of multiple q-zeta values, 15.12.2014
- Madrid (ICMAT), Workshop on Multiple Zeta Values, Modular Forms and Elliptic Motives II: On the generators of a certain algebra of q-multiple zeta values, 5.12.2014
- Darmstadt, Seminar Zahlentheorie: On the generators of a certain algebra of q-multiple zeta values, 25.11.2014
- Hamburg, Herbsttagung Hamburger mathematische Gesellschaft: Multiple Zeta Werte, 14.11.2014
- Oldenburg, Kolloquium: Multiple Eisensteinreihen, multiple Teilerfunktionen und ihre Anwendungen auf multiple Zeta Werte, 21.05.2014
- Köln, AKLS-Seminar: Multiple Eisenstein series, multiple divisor functions and applications to multiple zeta values, 19.02.2014
- Leiden, Moduli spaces and heights: Upper and lower bounds for omega square, 12.06.2013
- Banff, Arithmetic geometry of orthogonal and unitary Shimura varieties: Modularity of generating series for arithmetic Hecke correspondences, 6.6.2012
- Barcelona, Kyoto Paris Barcelona Seminar on Arakelov Geometry: On a modification of Kudla's Green functions, 08.09.2011
- Heidelberg, Kolloquium: On Kudla's Green function in the non-compact case, 04.11.2010
- Durham, Durham Days on modular forms: On Kudla's Green function in the non-compact case, 03.09.2010
- Iasi (Ro), A. Myller Math. Seminar Centennial Conf.: On the arithmetic self intersection number for particular curves, 23.06.2010
- EPFL Lausanne, Number theory Seminar: Arithmetic intersection numbers for modular curves and Fermat curves, 12.06.2010
- Durham, Kolloquium: A geometric approach to the abc-conjecture, 17.05.2010
- Durham, WaNDS: Arakelov theory for Shimura varieties, 14. 05.2010
- MPI Bonn, Number theory Seminar: Arithmetic intersection numbers webpage, 21.04.2010
- Regensburg, Arakelov Geometry and its arithmetic applications: Arithmetic intersection numbers of Fermat curves, webpage, 25.02.2010
- Tübingen, Kolloquium: Über arithmetische Selbstschnittzahlen zu Fermatkurven, 07.12.2009
- Hamburg, Orientierungseinheit: Ein erster Einblick in die Zahlentheorie, 08.10.2009
- Siegen, AKLS-Seminar: Scattering constants and Neron-Tate heights webpage , 30.09.2009
- Berlin, Moduli: Scattering constants and Neron-Tate heights, webpage, 28.08.2009
- Bayreuth, Vorstellungsvortrag: Berechnungen von Arakelov Schnittzahlen, 27.07.2009
- Hannover, Alg. Geo. Seminar: Explizite Berechnungen von arithmetischen Schnittzahlen, 05.06.2008
- Hamburg, Absolventenfeier: Die abc -Vermutung und andere Probleme in der Zahlentheorie, 06.02.2008
- St. Petersburg, Euler conference on Modular forms and Moduli spaces: Arithmetic intersection numbers on modular curves webpage, 04.07.2007
- Banff, Modular forms: Arithmetic and Computation: Computation of scattering constants, 07.06.2007
- Bonn, DMV-Tagung: Arakelov theory on modular curves, 18.09.2006
- Bedlewo (PL): On the height inequality for points on curves, 15.06.2006
- Wien, ESI: Arithmetic geometry associated with Hecke's Eisensteinseries of weight $2$, 24.01.2006
- Montreal, CRM: Mini course on Arakelov Geometry (joint with Bruinier, Burgos-Gil and Kramer), webpage, 14.12.2005
- Barcelona, CRM Seminar: On upper bounds for $\omega^2$ on arithmetic surfaces, 05.10.2005
- Oberwolfach, Arakelov geometry Tagung: On heights and arithmetic intersection numbers on arithmetic surfaces, 15.09.2005
- Köln, AKLS Seminar: Arithmetic geometry associated with Hecke's Eisensteinseries of weight $2$, 08.06.2005
- Paris 7, Seminaire geometrie d'Arakelov: Some remarks about heights and Chern classes on arithmetic surfaces, 02.05.2005
- Hamburg, Vorstellungsvortrag: Ein geometrischer Zugang zur $abc$-Vermutung, 01.02.2005
- ETH Zürich: Zahlentheorie Seminar: On height inequalities for arithmetic surfaces, 28.01.2005
- HU Berlin, Arith. Geo. Seminar: Eine obere Schranke für die arithmetische Selbstschnittzahl von Kurven, 18.01.2005
- Heidelberg, Zahlentheorie Seminar: Über die Höhenvermutung von Punkten auf Kurven, 17.01.2005
- HU Berlin, Arith. Geo. Seminar: Über die Höhenvermutung von Punkten auf Kurven, 11.01.2005
- Heidelberg, DMV-Tagung: Aktuelle Entwicklungen in der arithmetischen Schnitttheorie, 17.09.2004
- Göttingen, Diophantine Geometry: Arithmetic Intersection Theory on Hilbert Modular Surfaces, 20.06.2004
- Bonn, GATA: Arithmetic Hirzebruch-Zagier divisors on Hilbert modular surfaces, 02.06.2004
- Göttingen, Zahlentheorie Seminar: Arithmetische Schnitttheorie für Shimura Varietäten, 20.11.2003
- HU Berlin, Geburtstagskolloquium Holzapfel: A special case of Kudla's conjectures, 01.10.2003
- Oberwolfach, Alg. Zahlen. Tagung: On cohomological arithmetic Chow groups and applications, 26.06.2003
- HU Berlin, Arith. Geo. Seminar: Arithmetik und Existenz spezieller Borcherdsprodukte I + II, SS 2003
- HU Berlin, Kolloquiumsvortrag: Arithmetische Chowgruppen (Antrittsvorlesung), 06.05.2003
- Regensburg, Kolloquium: Arakelov Geometrie auf Hilbertschen Modulflächen, 10.04.2003
- HU Berlin, Arith. Geo. Seminar: Arithmetic intersection numbers and Eisenstein series, 04.02.2003
- Luminy, Internat. Conf. on Arakelov geometry: Arithmetic intersection numbers on Hilbert modular surfaces, 16.05.2002
- College Park, UMD Alg.+NT Seminar: Arakelov theory on modular curves, 27.02.2002
- ETH Zürich, Zahlen Seminar: Arithmetische Schnittzahlen zu Modulvarietäten von kleiner Dimension, 17.12.2001
- Amsterdam, KdV-Institut: Logarithmically metrics in Arakleov Geometry, 14.09.2001
- HU Berlin, Arith. Geo. Seminar: Neron-Tate Höhen und Untergruppen der Modulgruppe II, 03.07.2001
- Heidelberg, Oberseminar Zahlentheorie: Arakelov Theorie und Modulkurven, 10.01.2001
- Barcelona, Algebra Seminar: Arakelov theory on modular curves, 2000
- Obernai, Arith. Geo. Conference: Arakelov theory on modular curves, 1999
- Cambridge, Newton Institute: Arakelov theory on modular curves, 1998