Jan Lange

Since September 2026, I am a Research Associate in the group of Evgeny Shinder at the University of Sheffield. Previously, I obtained my PhD in June 2026 under supervision of Stefan Schreieder at Leibniz Universität Hannover. Here is my CV.

I am working in algebraic geometry and my current research interests are mainly algebraic cycles and rationality questions.

Contact

University of Sheffield
Hicks building
Hounsfield Road
Sheffield S37RH
UK

email: j.lange@sheffield.ac.uk

Preprints:

1. Torsion order and irrationality of complete intersections (joint with Guoyun Zhang)
   Preprint 2025
   (pdf | pdf with extra notes | arXiv)
2. On the rationality problem for low degree hypersurfaces (joint with Stefan Schreieder)
   Preprint 2024, to appear in Forum of Mathematics, Pi
   (pdf | arXiv)
3. On zero-cycles of varieties over Laurent fields
   Preprint 2024
   (pdf | arXiv)
4. The diagonal of (3,3) fivefolds (joint with Bjørn Skauli)
   Annales de l'Institut Fourier (Grenoble), Online first
   (pdf | journal | arXiv)

Theses:

PhD thesis:
Cycles and rationality of algebraic varieties (pdf | publication)
Advisor: Stefan Schreieder

Master thesis:
Rationality questions and decomposition of the diagonal (pdf)
Advisors: Stefan Schreieder and Nebojsa Pavic

Bachelor thesis:
Schnitttheorie und enumerative Geometrie [in German] (pdf)
Advisor: Stefan Schreieder