Rosa Winter - Research Associate

King's College London
Strand Campus, Office S5.43
Strand, London, WC2R 2LS
rosa.winter (at)
I am a research associate in the Number Theory Group of King's College London, working with Rachel Newton.

From 2020 until 2021 I was a postdoctoral researcher in the Nonlinear Algebra group at MPI-MiS 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

  • 04/02/2022 Algebra & Number Theory Seminar, Queen Mary University of London.
  • 10/02/2022 Number Theory Seminar, University of Oxford.
  • 02/03/2022 AGNT Seminar (online), Rice University.


  • 6. Recovery from Power Sums (with B. Sturmfels and H. Melánová). Submitted. arXiv (2021)
  • 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). Le Matematiche, Vol 76 No 2 (2021), pp. 461-481. journal.
  • 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). Graphs and Combinatorics, Vol 37 No 6 (2021), pp. 1965-2064. journal, arXiv, 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