Talks (list is neither complete nor chronological)
-
Schertz style class invariants for genus two
(joint work with Andreas Enge), June 2021,
AGC2T, CIRM (online) (slides)
- Obtaining modular units via a recurrence relation,
Warsaw Number Theory Seminar, May 2021, Online
(notes, video)
- Obtaining modular units via a recurrence relation,
Modular Forms and Curves of Low Genus: Computational Aspects, September 2015, ICERM Providence, RI, USA
(notes, video)
- Computing abelian varieties with complex multiplication,
International Congress on Mathematical Software (ICMS 2020),
session on Software for Number Theory and Arithmetic Geometry,
July 2020, Braunschweig, Germany (online due to pandemic),
video and slides
- Generators for the group of modular units for Gamma1(N)
over the rationals,
Arithmetic, Geometry and Coding Theory, 2015, CIRM Marseille, France
(video, corrected slides)
- The Elliptic Curve in https,
Lunchlezing, 2015, TU Delft (slides)
- Schertz style class invariants for genus two
(joint work with Andreas Enge), June 2021,
August 2014, KAIST, Daejeon, South Korea
- Families of class invariants in genus two
(joint work with Andreas Enge),
Effective Moduli
Spaces and Applications to Cryptography,
June 2014,
Rennes, France
- An unsolved Diffie-Hellman problem over Q,
Discrete Logarithm Problem 2014,
May 2014,
Ascona, Switzerland
(slides)
- Elliptic Curves: complex multiplication, application, and generalization,
General Mathematics Colloquium, December 2013, Universiteit Utrecht
(slides)
- Applications of class groups of CM-fields
(joint work with Florian Bouyer, Gaetan Bisson, Pınar Kılıçer) at
Elliptic Curve Cryptography (ECC 2013),
September 2013, Leuven, Belgium
(slides)
- Height reduction of hyperelliptic curves
(joint work with Florian Bouyer) at
Sage Days: Algorithms in Arithmetic Geometry,
July 2013, Leiden (slides)
-
Class groups of endomorphism rings of abelian varieties
(joint work with Gaetan Bisson) at
Warwick Number Theory Symposium:
Number Theory, Geometry and Cryptography
July 2013, Warwick
- Smaller class invariants for quartic CM-fields at:
- Smaller class invariants for constructing curves
of genus two at:
- LFANT Seminar, March 2012, Bordeaux, France (slides)
- Elliptic Curve Cryptography (ECC 2011), September 2011, Nancy, France
(slides)
-
GeoCrypt,
Conference on Geometry and Cryptography,
June 2011, Corsica, France
(slides)
- Complex multiplication, ECC Summer School, September 2011, Nancy, France
- Class invariants for quartic CM-fields,
Number Theory Seminar, June 2011, Oxford, UK (slides)
- Algebraic values of complex functions,
DIAMANT symposium,
May 2011, Heeze, The Netherlands (slides)
- Igusa class polynomials at:
- University of Nottingham, Number Theory Seminar, May 2011, Nottingham, UK
(slides)
- Cambridge Number Theory Seminar, April 2011, Cambridge, UK
(slides)
- University of Exeter, Pure Mathematics Seminar, November 2010, Exeter, UK (slides)
- University of Washington Number Theory and Computation Seminar, December 2008, Seattle, USA (slides)
- Genus 2 day,
Intercity Number Theory Seminar, April 2008, Utrecht, the Netherlands
(slides)
- the AMS Special Session on Low Genus Curves and Applications,
Joint Mathematics Meetings, January 2008, San Diego, USA
(slides)
- Abelian surfaces admitting an (l,l)-endomorphism
(joint work with Reinier Bröker and Kristin Lauter,
notes) at:
- Intercity Number Theory Seminar, December 2009, Utrecht, the Netherlands
- LFANT Seminar, November 2009, Bordeaux, France
-
Mini-workshop series on computational number theory,
October 2009, KU Leuven, Belgium
- Number Theory Lunch Seminar, September 2009,
Max Planck-Institut für Mathematik, Bonn, Germany
- Abelian varieties with prescribed embedding degree
(joint work with David Freeman and Peter Stevenhagen),
C4, June 2008, École Polytechnique, Palaiseau, France (slides)
-
Elliptic Divisibility Sequences with Complex Multiplication, Number Theory and Computability, June 2007, Edinburgh, Scotland (poster with my face on it)
- Elliptic Divisibility Sequences and Modular Units,
Journees Arithmetiques 2015, Debrecen, Hungary
(slides)
- Modular units and elliptic divisibility sequences,
Intercity Number Theory Seminar, October 2015, Universiteit Leiden
(preprint)
- Elliptic Curves: complex multiplication, application, and generalization,
General Mathematics Colloquium, November 2013, Universiteit Leiden
(slides)
- Computing endomorphism rings of abelian varieties
using class groups (joint work with Gaetan Bisson)
,
Algebra, geometry and number theory seminar, November 2013,
Universiteit Leiden
- Faster number theory with smaller numbers,
This week's discoveries, April 2013, Universiteit Leiden
(slides)
- Elliptic Curves: complex multiplication, application, and generalization,
General Mathematics Colloquium, October 2012, VU University Amsterdam
(slides)
- Smaller class invariants for quartic CM-fields,
Warwick Number Theory Seminar,
March 2012
- Igusa class polynomials at:
- Warwick
Number Theory Seminar, October 2010 (slides)
-
DIAMANT/EIDMA Symposium, November 2009, Lunteren, the Netherlands (slides)
-
Explicit Methods in Number Theory, July 2009, MFO
Oberwolfach, Germany (slides)
- GTEM Instructional Conference: Number Fields, Lattices and Curves, June 2008, Cetraro, Italy (slides)
- Abelian varieties with prescribed embedding degree
(joint work with David Freeman and Peter Stevenhagen), ANTS-VIII, May 2008, Banff, Canada
(slides)
-
Elliptic Divisibility Sequences with Complex Multiplication at:
-
UC Irvine Number Theory Seminar, January 2008, Irvine, USA (slides)
-
Journées Arithmétiques, July 2007, Edinburgh, Scotland (slides)
- DIAMANT/EIDMA Symposium, May/June 2007, Heeze, the Netherlands (slides)
- Intercity Number Theory Seminar, April 2006, Utrecht, the Netherlands