Marco Streng

*Schertz style class invariants for genus two*(joint work with Andreas Enge), June 2021, AGC^{2}T, 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 Gamma*, Arithmetic, Geometry and Coding Theory, 2015, CIRM Marseille, France (video, corrected slides)^{1}(N) over the rationals*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:- Intercity Number Theory Seminar, September 2012, Leiden
- Heilbronn seminar, May 2012, Bristol, UK (slides).
- Pure Maths Colloquium, March 2012, Sheffield, UK (slides)

*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