Talks
- 14.02.2020, Universität Hamburg:
Arithmetik und Geometrie algebraischer Flächen - 21.01.2020, University of Tokyo:
(Few) rational curves on K3 surfaces
[Algebraic Geometry Seminar] - 31.10.2019, Universität Bielefeld:
(Few) rational curves on K3 surfaces
[Oberseminar Arithmetische Geometrie] - 18.06.2019, Universität Leipzig:
Arithmetik und Geometrie algebraischer Flächen - 12.06.2019, Institute of Mathematics, Polish Academy of Sciences, Krakow:
Smooth rational curves on K3 surfaces - 21.05.2019, Åbo University, Turku:
Smooth rational curves on K3 surfaces
[N-cube days X] - 20.01.2019, University of Tokyo:
Equicharacteristic models of nodal Enrques surfaces
[Workshop Arithmetic and Algebraic Geometry 2019] - 12.09.2018, Cetraro:
Lines on surfaces in IP^3 - from quartics to quintics
[Conference Differential, Algebraic and Topological Methods in Complex Algebraic Geometry] - 11.07.2018, FBK, Trento:
Zariski K3 surfaces
[Workshop Recent Progress in the Arithmetic and Geometry of K3 Surfaces] - 15.06.2018, UFRJ, Rio:
Singular K3 surfaces of class number 2
[Geometry seminar] - 03.05.2018, Shepperton:
Singular K3 surfaces of class number 2
[Mini-Conference K3 surfaces and Galois representations] - 26.04.2018, Pedagogical University, Krakow:
Zariski K3 surfaces
[Workshop and Conference Modern and Classical Aspects on Algebraic Surfaces] - 30.01.2018, Hosei University, Tokyo:
Zariski K3 surfaces
[Workshop Algebraic Geometry in Positive Characteristic and Related Topics] - 07.12.2017, Universität Bayreuth:
Elliptische Flächen - 07.11.2017, University of Warwick:
Zariski K3 surfaces
[Warwick Algebraic Geometry Seminar] - 12.07.2017, Humboldt-Universität Berlin:
Enriques surfaces with maximal root types: moduli and good reduction
[Conference Higgs Bundles, K3 Surfaces and Moduli] - 22.06.2017, Uniwersytetu Jagiellońskiego, Krakow:
Nodal curves and Enriques surfaces - 02.06.2017, Universität Göttingen:
Elliptic surfaces in geometry and arithmetic
[Göttingen-Hannover Number Theory Workshop] - 30.03.2017, Haeundae, Korea:
Configurations of nodal curves on Enriques surfaces
[Algebraic Geometry Conference (Keum60)] - 13.12.2016, University of Tokyo:
Singular K3 surfaces of class number 2
[Conference Arithmetic and Algebraic Geometry] - 04.11.2016, Albert-Ludwigs-Universität Freiburg:
Elliptic surfaces - 14.06.2016, Bedlewo:
Gorenstein Q_l-cohomology projective planes
[Conference: Varieties with trivial canonical bundles] - 17.02.2016, Universität Saarbrücken:
Geraden auf glatten Quartiken in IP^3 - 11.02.2016, FU Berlin:
Lines on smooth quartics in IP^3
[Arithmetic Geometry Seminar] - 04.02.2016, Universität Bielefeld:
Eine glatte Quartik in IP^3 mit 60 Geraden und S_5-Symmetrie - 27.01.2016, Tokyo University:
Gorenstein Q_l-cohomology fake projective planes
[Conference Algebraic and Arithmetic Geometry 2016] - 17.12.2015, Gutenberg-Universität Mainz:
Moduli of Gorenstein Q-homology fake projective planes
[SFB-Kolloquium] - 02.12.2015, University of Cambridge:
Moduli of Gorenstein Q-homology fake projective planes
[Algebraic Geometry Seminar] - 19.11.2015, KIAS, Seoul:
Moduli of Gorenstein Q-homology fake projective planes
[Conference on K3 surfaces and related topics] - 19.10.2015, ICERM, Providence:
Modularity of K3 surfaces and Calabi-Yau threefolds
[Workshop Explicit methods for modularity of K3 surfaces and other higher weight motives] - 29.01.2015, University of Tokyo:
Profile of some beautiful K3 surfaces
[Conference Algebraic and Arithmetic Geometry 2015] - 12.11.2014, Universität Bielefeld:
Picard numbers — K3 surfaces and beyond - 2.07.2014, Universität Leipzig:
K3 surfaces
[Felix Klein Kolloquium] - 7.05.2014, Schiermonnikoog:
The maximum number of lines on smooth quartic surfaces
[Conference on K3 surfaces and their moduli] - 25.03.2014, Leibniz Universität Hannover:
From modularity to Maschke's octic and back
[Workshop Experimental Methods in Computational Algebra] - 20.03.2014, LMU München:
The maximum number of lines on smooth quartic surfaces
[Workshop Geometry and Arithmetic of Surfaces] - 17.02.2014, Universität Osnabrück:
64 lines on smooth quartic surfaces
[Kolloquium] - 27.01.2014, Tokyo University:
64 lines on smooth quartic surfaces
[Arithmetic and Algebraic Geometry 2014] - 13.11.2013, Fields Institute Toronto:
64 lines on smooth quartic surfaces
[Thematic Program on Calabi-Yau Varieties] - 12.11.2013, Fields Institute Toronto:
Picard numbers of quintic surfaces
[Thematic Program on Calabi-Yau Varieties] - 29.01.2013, Tokyo University:
Picard numbers of quintic surfaces
[Arithmetic and Algebraic Geometry 2013] - 14.11.2012, Universität Rostock:
Arithmetik von K3 Flächen
[Mathematisches Kolloquium] - 9.11.2012, Universita degli studi di Milano:
Picard numbers of quintic surfaces - 12.09.2012, Leibniz Universität Hannover:
Picard-Zahlen von Quintiken - 30.06.2012, Krakow:
Picard numbers of quintic surfaces
[ECM satellite conference "Algebraic and Arithmetic Geometry"] - 30.05.2012, KU Leuven:
Arithmetic of K3 surfaces - 16.04.2012, Universität Zürich:
Arithmetic of quintic surfaces
[Oberseminar Algebraische Geometrie] - 16.01.2012, Institut für experimentelle Mathematik, Essen:
Die Modularität von Maschkes Oktik und Calabi-Yau-Varietät - 16.12.2011, Rijksuniversiteit Groningen:
Arithmetic of quintic surfaces
[Intercity Number Theory Seminar] - 08.12.2011, Freie Universität Berlin:
Arithmetik algebraischer Flächen - 06.12.2011, Humboldt Universität Berlin:
Modularity of Maschke's octic and Calabi-Yau threefold
[Forschungsseminar "Arithmetische Geometrie"] - 01.12.2011, Universität Augsburg:
Arithmetik von K3-Flächen
[Oberseminar] - 21.11.2011, Goethe-Universität Frankfurt
Arithmetik von Quintiken
[Kolloquium zur algebraischen Geometrie] - 10.10.2011, CIRM, Luminy:
Shimura varieties for abelian fourfolds with an automorphism of order five
[Conference on Moduli spaces and automorphic forms ] - 06.09.2011, Carl von Ossietzky Universität, Oldenburg:
Sandwich-Theoreme für Shioda-Inose Strukturen
[Oberseminar] - 16./17.08.2011, Fields Institute Toronto:
Arithmetic of K3 surfaces
[Workshop on Arithmetic and Geometry of K3 surfaces and Calabi-Yau threefolds] - 15.07.2011, Institut für experimentelle Mathematik, Essen:
Arithmetik von Quintiken - 08.07.2011, Universität Ulm:
Arithmetik algebraischer Flächen - 01.07.2011, Ruprecht-Karls-Universität Heidelberg:
Shimura varieties for abelian fourfolds with an automorphism of order five
[Hauptseminar Algebra und Zahlentheorie] - 14.04.2011, Universität Bonn/MPI:
Shimura varieties for abelian fourfolds with an automorphism of order five
[Seminar Algebraic Geometry] - 31.03.2011, Uniwersytet Pedagogiczny, Krakow:
Lines on Fermat surfaces - 28.03.2011, Uniwersytetu Jagiellońskiego, Krakow:
Shimura varieties for abelian fourfolds with an automorphism of order five - 14.03.2011, Oslo University:
Oversiktsforedrag over modularitet til Calabi-Yau variteter
[Seminar in Algebra and Algebraic geometry] - 24.11.2010, Nagoya University:
Lines on Fermat surfaces
[Workshop Lattices, Reflection groups and Algebraic Geometry] - 18.11.2010, Technische Universität Darmstadt:
Arithmetik und Geometrie algebraischer Flächen - 29.10.2010, Lorentz Center, Leiden:
Shimura varieties for abelian fourfolds with an automorphism of order five
[Conference Arithmetic of Surfaces] - 30.09.2010, Copenhagen University:
Lifts of projective congruence groups - 29.09.2010, Copenhagen University:
Noncongruence groups and modular forms - 07.09.2010, Levico Terme, Italy:
Arithmetic of singular Enriques surfaces
[Conference Perspectives on Algebraic Varieties] - 16.08.2010, Universität Duisburg-Essen:
Arithmetic of algebraic surfaces - 01.06.2010, Universita' degli Studi di Milano:
Arithmetic of Enriques surfaces
[Algebraic Geometry Seminar Milano] - 21.05.2010, Goethe-Universität Frankfurt
Modulformen und K3-Flächen - 11.05.2010, Leibniz Universität Hannover
Modularität und K3-Flächen
[Antrittsvorlesung im Mathematisch-Physikalischen Kolloquium] - 23.04.2010, Utrecht University:
Arithmetic of K3 surfaces
[Dutch Mathematical Congress] - 08.03.2010, Hausdorff Institute, Bonn:
Elliptic surfaces
[Seminar: Algebra and Number Theory] - 17.02.2010, Tokyo University:
Non-liftable Calabi-Yau spaces
[Algebraic Geometry in characteristic p and related topics] - 15.02.2010, Nagoya University:
Enriques surfaces and jacobian elliptic K3 surfaces
[Algebraic Geometry Seminar] - 13.01.2010, Carl von Ossietzky Universität, Oldenburg:
K3-Flächen und Modulformen
[Colloquium] - 21.12.2009, Leibniz Universität Hannover:
Calabi-Yau threefolds: fiber products of rational elliptic surfaces
[Colloquium of the DFG graduate school 1463] - 20.11.2009, Freie Universität, Berlin:
Arithmetic of Enriques surfaces
[NoGAGS] - 17.11.2009, Universität Hamburg:
K3 surfaces and modular forms
[Colloquium for pure mathematics] - 30.09.2009, Harvard University:
Arithmetic of Enriques surfaces
[Number Theory Seminar] - 10.09.2009, Chuo University, Tokyo:
Lines on Fermat surfaces - 02.09.2009, Rikkyo University, Tokyo:
Arithmetic of Enriques surfaces
[Workshop on K3, Enriques and Special Surfaces] - 01.09.2009, Tokyo University:
Arithmetic of K3 surfaces
[Algebraic Geometry Seminar] - 12.06.2009, Heinrich-Heine-Universität, Düsseldorf:
Arithmetik und Geometrie von K3 Flächen - 17.04.2009, Utrecht:
K3 surfaces and modular forms
[Joint AKLS - InterCity seminar on modular forms in Utrecht] - 19.01.2009, Jussieu, Paris:
K3 surfaces and modular forms
[Seminaire de theorie des nombres de Chevaleret] - 01.12.2008, Banff, Canada:
K3 surfaces and modular forms
[Arithmetic of K3 surfaces] - 12.11.2008, KIAS, Seoul:
K3 surfaces and modular forms
[Algebraic Geometry in East Asia] - 06.11.2008, Nagoya University:
Neron-Severi groups of surfaces in characteristic 0 and p
[Algebraic Geometry in Positive Characteristics and Related Topics] - 31.10.2008, Hiroshima University:
K3 surfaces and modular forms
[Algebra seminar] - 14.10.2008, Humboldt Universität, Berlin:
K3 surfaces and modular forms
[Research seminar Algebraic Geometry] - 10.10.2008, University of Copenhagen:
Surfaces with maximal Picard number
[KU Number Theory Seminar] - 23.09.2008, Leibniz Universität Hannover:
Arithmetik von K3 Flächen - 15.09.2008, Albert-Ludwigs Universität Freiburg:
K3-Flächen und Modulformen - 12.06.2008, Leibniz Universität Hannover:
K3-Flächen vom Picard Rang 20
[Research Seminar Algebraic and Arithmetic Geometry] - 02.06.2008, Uniwersytetu Jagiellońskiego, Krakow:
K3 surfaces and modular forms
[Seminar on algebraic and analytic geometry] - 18.03.2008, Queen's University, Kingston, ON:
K3 surfaces of Picard rank 20
[Queen's Number Theory Seminar] - 17.03.2008, Queen's University, Kingston, ON:
Lines on Fermat surfaces
[Queen's Algebraic Geometry Seminar] - 15.03.2008, Fields Institute, Toronto, ON:
K3 surfaces and modular forms
[Workshop on algebraic varieties] - 17.01.2008, Universität Duisburg-Essen:
K3 surfaces and modular forms
[Oberseminar Algebraische Geometrie Duisburg-Essen-Düsseldorf] - 12.01.2008, Courant Research Center Göttingen:
K3 surfaces and modular forms
[Courant-Colloquium] - 10.01.2008, Leibniz Universität Hannover:
K3-Flächen und Modulformen
[Research Seminar Algebraic and Arithmetic Geometry] - 18.12.2007, University of Copenhagen:
K3 surfaces and modular forms
[Copenhagen Mathematics Colloquium] - 03.12.2007, MIT, Cambridge, MA:
K3 surfaces of Picard rank 20 over Q
[MIT STAGE] - 13.11.2007, MIT, Cambridge, MA:
Calabi-Yau threefolds as fibre products of rational elliptic surfaces
[Harvard/MIT algebraic geometry seminar] - 30.10.2007, Brandeis University, Waltham, MA:
Singular K3 surfaces
[Everytopic Seminar] - 13.09.2007, University of Texas, Austin, TX:
Singular K3 surfaces
[University of Texas - algebra, number theory and combinatorics seminar] - 06.09.2007, Rikkyo University, Tokyo:
Singular K3 surfaces
- 29.08.2007, Nagoya University:
Singular K3 surfaces and modular forms
[Conference on Birational Automorphisms of Compact Complex Manifold and Dynamical Systems] - 16.08.2007, Queen's University, Kingston, ON:
Singular K3 surfaces and modular forms - 27.03.2007, Amherst College:
Singular K3 surfaces
[Amherst Five College Number Theory Seminar] - 26.02.2007, Boston University:
Singular K3 surfaces
[Boston University Algebra Seminar] - 08.02.2007, Georg-August-Universität Göttingen:
Singuläre K3 Flächen
[Events calendar of the mathematical faculty Göttingen (German)] - 21.12.2006, Rheinische Friedrich-Wilhelms-Universität Bonn:
Singular K3 surfaces
[Bonn mathematics events calendar] - 09.12.2006, CMS Winter 2006 Meeting:
Classifying singular K3 surfaces
[Session on Calabi-Yau Varieties and Mirror Symmetry] - 14.11.2006, Rice University, Houston:
Classifying singular K3 surfaces
[Rice Algebraic Geometry Seminar] - 24.10.2006, Harvard University:
Classifying singular K3 surfaces
[Harvard/MIT Algebraic Geometry Seminar] - 21.10.2006, Fields Institute, Toronto:
CM-modular forms and Calabi-Yau varieties
[Workshop on Algebraic Varieties] - 04.10.2006, Harvard University:
CM newforms with rational coefficients
[Harvard/ Number Theory Seminar] - 08.07.2006, Lauenbrück Seminar:
Elliptic modular surface for the commutator subgroup of SL(2,Z) - 16.03.2006, Universita' degli Studi di Milano:
Modularity of Calabi-Yau varieties
[Number Theory Seminar Milano] - 02.02.2006, Universita' degli Studi di Milano:
Calabi-Yau threefolds as fibre products of elliptic surfaces
[Algebraic Geometry Seminar Milano] - 20.12.2005, University Duisburg-Essen, Germany:
Arithmetic of singular K3 surfaces and Hecke eigenforms
[DFG-Research group "Arithmetic and Geometry"] - 09.08.2005, AMS Summer Institute on Algebraic Geometry, University of Washington, Seattle, USA:
Arithmetic of K3 surfaces
[2005 AMS Summer Institute on Algebraic Geometry] - 28.04.2005, University of Hannover, Germany:
Hecke eigenforms with complex multiplication and rational coefficients
[Oberseminar AKG Hannover] - 18.03.2005, University of Groningen, Netherlands:
Extremal elliptic K3 fibrations
[Intercity number theory seminar] - 25.11.2004, University of Hannover, Germany:
Singular K3 Surfaces
[Oberseminar AKG Hannover] - 16.11.2004, University of Mainz, Germany:
On the modularity of certain fibre products of the rational elliptic modular surface of level 5
[Gästeseite AG Mainz] - 05.04.2004, University of Hannover, Germany:
Modular Calabi-Yau threefolds arising from the modular elliptic surface of level 5
[AKG Miniworkshop] - 23.03.2004, Duke University, Durham, NC, USA:
New examples of modular rigid Calabi-Yau threefolds
[Duke AG, Spring 2004]