Talks

Upcoming talks

6-7 November 2025, Frans Oort 90 symposium, Utrecht

20-21 November 2025, DIAMANT symposium, Lunteren

2 December 2025, Algebraic Geometry Seminar, Utrecht

3 December 2025, KdVI General Mathematics Colloquium, Amsterdam

15-19 December 2025, Taipei Conference on Arithmetic Geometry, Taipei (online)

Past talks

"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"

"When is a polarised abelian variety determined by its p-divisible group?"

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"

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

"Galois theory, dynamics, and combinatorics of Belyi maps"

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

"Local-global principles in arithmetic geometry"

"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

"Maximal and minimal behaviour of supersingular abelian varieties"

"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

"Galois representations and symplectic Galois groups over Q"

slides

"Survey on local fields"

"Introduction to global class field theory"

"The algebraic fundamental group"

"p-adic uniformisation"