Maarten Derickx
About meI'm Maarten Derickx. I'm currently a postdoc at the university of Groningen and will join the Simons Collaboration on Arithmetic Geometry, Number Theory, and Computation at MIT sometime in 2018. I received my Ph.D. at the universities of Leiden, Bordeaux and Milano as an joint Algant doctorate .

Projects
I help with the developement of Sage and maintain the sage server at Leiden university. I keep all my reusable sage and magma functions in two separate packages called MDSage (documentation) and MDMagma. Together with Solomon Vishkautsan I wrote a magma package called Chabauty that helps with doing explicit Chabauty computations.Publications
Title  Journal  Preprint 

Torsion of elliptic curves over cyclic cubic fields  with Filip Najman  arXiv  
Groups of generalized Gtype and applications to torsion subgroups of rational elliptic curves over infinite extensions of Q  with Harris B. Daniels and Jeffrey Hatley  arXiv  
Torsion points on elliptic curves over number fields of small degree  with Sheldon Kamienny, William Stein and Michael Stoll  arXiv  
Computing Galois representations and equations for modular curves X_{H}(l)  with Mark van Hoeij and Jinxiang Zeng  arXiv  
Rational families of 17torsion points of elliptic curves over number fields (2018) with Barry Mazur and Sheldon Kamienny  Contemporary Mathematics  
Torsion subgroups of elliptic curves over quintic and sextic number fields (2017) with Andrew V. Sutherland  Proceedings of the AMS  arXiv 
Gonality of the modular curve X_{1}(N) (2014) with Mark van Hoeij  J. of Algebra  arXiv 
Torsion points on elliptic curves over number fields of small degree, Ph.D. Thesis (Sep 2016)  Universiteit Leiden Theses  PDF 
Torsion points on elliptic cruves and gonalities of modular curves, Masters Thesis (Sep 2012)  Univertiteit Leiden Theses  PDF code 
Infinitesimally Rigid Construction of the Algebraic Numbers, Bachelor Thesis (June 2010)  Univertiteit Leiden Theses 
Talks & Notes
Date  Subject  Where  Notes/Slides 

05062014  The rational group structure of modular Jacobians.  LMFDB Workshop, Warwick  Slides (pdf) 
30102013  Finding all points of degree < gonality on Y_{1}(N).  Harvard Number Theory Seminar  Slides (pdf) 
18092013  Computing modular units and gonalities of modular curves.  Elliptic Curve Cryptography Workshop 2013  Slides (pdf) 
23072013  Computing modular Galois representations  the modulo p approach (after Jinxiang Zeng)  Sage Days 51: Algorithms in Arithmetic Geometry, Lorentz Centre Leiden  Slides (pdf) 
01032013  Gonalities of modular curves.  Intercity Seminar "Gonalteiten dag", Utrecht  Slides (pdf) 
28092012  Torsion points on Elliptic curves.  Intercity Number Theory Seminar, Leiden  Slides (pdf) 
25092012  Gonalities of modular curves.  Masters defense. Universiteit Leiden  Slides (pdf) 
The representability of Γ_{1}(N), an explicit construction of Y_{1}(N). 
Algebraic Geometry Seminar (Leiden)  Notes (pdf) 