Talks

Upcoming talks

No talks planned for now.

Past talks

"Moduli spaces: classifying, constructing and counting varieties",
• KdVI General Mathematics Colloquium, Amsterdam, December 2025 (slides)
• DIAMANT symposium, Lunteren (NL), November 2025 (slides)

"Endomorphisms and automorphisms of abelian varieties", From 0 to p and back, Utrecht, November 2025

"Arithmetic invariants of supersingular abelian varieties"
• Taipei Conference on Arithmetic Geometry, Taipei (online), December 2025 (slides)
• London number theory seminar, Imperial College London, October 2025

"Supersingular abelian varieties and their automorphism groups"
• April 2025, Arithmetic Mittagsseminar, Universität Münster
• March 2025, Algebraic Geometry in Hannover, Leibniz Universität Hannover
• February 2025, Intercity Number Theory Seminar, UvA/VU Amsterdam
• November 2024, Arithmetic and Homotopic Galois Theory seminar, RIMS, Kyoto

"Abelian varieties in characteristic p", Penn Mathematics Colloquium, University of Pennsylvania, Philadelphia, February 2024

"When is a polarised abelian variety determined by its p-divisible group?"
• December 2025, Algebraic Geometry Seminar, Utrecht University
• June 2025, p-adic and Characteristic p Methods in Algebraic Geometry, EPFL, Lausanne
• February 2024, Number Theory Seminar, Institut Fourier, Grenoble
• January 2024, Number Theory Seminar, Université Clermont Auvergne
• November 2023, Oberseminar Algebra and Number Theory, Universität Ulm

"Isomorphism classes of polarised abelian varieties and Drinfeld modules over finite fields"
• June 2024: Algorithmic Number Theory Seminar, Université de Bordeaux (slides)
• January 2024, Number Theory Seminar, NCTS Taiwan (online) (slides)
• November 2022, Arithmetic and Algebraic Geometry Seminar, University of Amsterdam (slides)

"Isomorphism classes of Drinfeld modules over finite fields", AMS-EMS-SMF Joint Mathematical Meeting, Grenoble, July 2022 (slides)

"The Gauss problem for central leaves"
• November 2022, Heilbronn Number Theory Seminar, University of Bristol
• November 2022, Number Theory Seminar, University of Cambridge
• November 2022, Number Theory Seminar, University of Oxford
• October 2022, GAUS seminar, Goethe Universität Frankfurt
• October 2022, Algebraic Geometry and Number Theory seminar, Chalmers University of Technology, Göteborg
• September 2022, Belgian-Dutch Algebraic Geometry Day, Leuven
• July 2022, Algebraic Geometry (Preprint) Seminar, Utrecht University
• June 2022, Séminaire Arithmétique et géométrie algébrique, IRMA, Université de Strasbourg

"Mass formulae for supersingular abelian varieties"
• January 2022, VaNTAGe seminar (online) (slides, video)
• May 2021,"Curves over finite fields: past, present and future" conference (online) (slides, video)

"Polarisations of abelian varieties over finite fields via canonical liftings"
• December 2021, CMS Winter Meeting, Algebraic Number Theory session (online) (slides)
• April 2021, Number Theory Seminar, IMPAN, Warsaw (online) (slides, video)
• April 2021, Number Theory Seminar, University of Georgia (online)

"Abelian varieties over finite fields"
• June 2022, General Mathematics Colloquium, Leiden University
• December 2020, Utrecht Geometry Center Seminar, Utrecht University (online) (video)

"Mass formulae for supersingular abelian threefolds"
• January 2021, Number Theory Seminar, Warwick University (online) (slides)
• December 2020, Algebra Seminar, Groningen University (online)
• May 2020, N-cube Days XII (online) (slides)
• April 2020, WAGON (Western Algebraic Geometry Online) (slides, video)

"Arboreal Galois representations"
• March 2021, Oberwolfach workshop "Homotopic and geometric Galois theory" (online) (slides, video)
• February 2020, 5th KTGU Mathematics Workshop for Young Researchers, Kyoto University
• January 2020, Séminaire Arithmétique et Théorie de l'Information, Institut de Mathématiques de Marseille
• December 2019, Luxembourg Number Theory Day, Luxembourg
• March 2019, Number Theory Seminar, MIT

November 2019, "Galois theory, dynamics, and combinatorics of Belyi maps", DIAMANT symposium, De Bilt (NL) (slides)

"Comparing obstructions to local-global principles for rational points over semiglobal fields"
• December 2019, Number Theory Seminar, Stockholm University
• November 2019, Algebraic Geometry Seminar, Cambridge University
• February 2019, Number Theory Seminar, Boston University
• December 2018, Symmetry, Geometry and Arithmetic Seminar, Universität Heidelberg
• November 2018, Number Theory Seminar, University of Wisconsin-Madison

"Arithmetic of twists of supersingular abelian varieties"
• June 2019, Arithmetic of Low-Dimensional Abelian Varieties (workshop), ICERM
• October 2019, Supersingular abelian varieties and related arithmetic (workshop), Nagoya University

February 2019, "Local-global principles in arithmetic geometry", Colloquium, Colorado State University

"Dynamics of Belyi maps"
• September 2018, Algebra Seminar, Temple University
• July 2018, Algebra and Number Theory Seminar, Universität des Saarlandes
• January 2018, Number Theory Seminar, Utrecht University
• December 2017, Collaborative Number Theory Seminar, CUNY
• November 2017, Harvard/MIT Algebraic Geometry Seminar

"Fully maximal and minimal supersingular abelian varieties"
• March 2018, Number Theory Seminar, California Institute of Technology
• December 2017, Algebra and Number Theory Seminar, Penn State University
• July 2017, Journées Arithmétiques, University of Caen (slides)
• June 2017, Arithmetic, Geometry, Cryptography and Coding Theory conference, CIRM, Luminy (slides)
• August 2017, Algebra Seminar, TU Munich

November 2016, "Maximal and minimal behaviour of supersingular abelian varieties", FRAGMENT Seminar, Colorado State University

"Local and adelic Hecke algebra isomorphisms"
• July 2018, Oberwolfach workshop "Field arithmetic"
• January 2017, Algebraic Geometry Seminar, Courant Institute, New York
• October 2016, Philadelphia Area Number Theory Seminar, Bryn Mawr College
• October 2016, Algebra and Number Theory Seminar, Yale University
• September 2016, Algebra Seminar, University of Pennsylvania
• April 2016, Seminar of Algebra, University of Seville
• December 2015, Number Theory Seminar, University of Copenhagen
• October 2015, Young Women in Algebraic Geometry, Hausdorff Center for Mathematics, Bonn (poster)

"The Inverse Galois Problem for symplectic groups"
• January 2017, Joint Mathematics Meetings, Atlanta (slides)
• March 2016, BeNeLux Mathematical Congress, Amsterdam
• September 2015, FRAGMENT Seminar, Colorado State University
• July 2015, Journées Arithmétiques, University of Debrecen (slides)
• June 2015, Geometry and Algebra Seminar, Utrecht University

"Hecke algebra isomorphisms and adelic points on algebraic groups"
• December 2014, Number Theory Lunch Seminar, Max Planck Institute for Mathematics, Bonn
• November 2014, Number Theory Seminar, University of California, San Diego
• November 2014, Number Theory Seminar, University of Colorado, Boulder
• October 2014, Intercity Number Theory Seminar, Utrecht

June 2014, "Galois representations and symplectic Galois groups over Q", Diamant symposium, Arnhem. (slides)

November 2013, "Survey on local fields", Seminar Fourier analysis on number fields, Utrecht University

October 2013, "Introduction to global class field theory", PhD colloquium, Utrecht University

June 2013, "The algebraic fundamental group", Seminar Galois groups and fundamental groups, Utrecht University

March 2012, "p-adic uniformisation", Part III seminar series, Cambridge University