Rosa Winter

Max-Planck-Institut für Mathematik in den Naturwissenschaften
Office G3 03
Inselstraße 22
04103 Leipzig
+49 341 9959 806
rosa.winter (at)
I am a postdoctoral researcher in the Nonlinear Algebra group of Bernd Sturmfels at the Max Planck Institute for Mathematics in the Sciences in Leipzig. Before this I was a PhD student under the supervision of Martin Bright and Ronald van Luijk at Universiteit Leiden. In my thesis I worked on the density of rational points and the configurations of lines on del Pezzo surfaces of degree one, and their relation to torsion points on elliptic fibrations.

Here is my CV (updated February 2021), and here is my PhD thesis.

Upcoming talks

  • 22/06/2021 Nonlinear Algebra Seminar, MPI-MiS, Leipzig.
  • 07/07/2021 Browning group working seminar (online), IST Austria, Vienna.
  • 11/11/2021 Zoom Algebraic Geometry Seminar (ZAG).


  • 5. Density of rational points on a family of del Pezzo surfaces of degree one (with J. Desjardins). Submitted. arXiv (2021), with magma code.
  • 4. Linear Spaces of Symmetric Matrices with Non-Maximal Maximum Likelihood Degree (with Y. Jiang and K. Kohn). To appear in Le Matematiche. arXiv (2020).
  • 3. Fields of definition of elliptic fibrations on covers of certain extremal rational ellipic surfaces (with V. Cantoral-Farfán, A. Garbagnati, C. Salgado, and A. Trbović). To appear in Women in Numbers Europe III: Research Directions in Number Theory. arXiv (2020).
  • 2. Concurrent exceptional curves on del Pezzo surfaces of degree one (with R. van Luijk). Submitted. arXiv (2019), with magma code 1 and magma code 2.
  • 1. The action of the Weyl group on the E8 root system (with R. van Luijk). To appear in Graphs and Combinatorics. arXiv (2019), with magma code.
  • PhD thesis: Geometry and arithmetic of del Pezzo surfaces of degree 1 (2021).
  • Master thesis: Concurrent exceptional curves on del Pezzo surfaces of degree one (2014).
  • Bachelor thesis: Elliptic curves over Qp (2011).


Seminars I organized