Tim Gräfnitz

Since October 2023 I am a postdoctoral researcher at Leibniz Universität Hannover. Before, I was a postdoc at Ruhr-Universität Bochum and the University of Cambridge. I received my PhD in March 2021 from the University of Hamburg under supervision of Bernd Siebert. Here is my CV.

Research interests: Algebraic Geometry, Logarithmic Geometry, Tropical Geometry, Enumerative Geometry, Mirror Symmetry, Birational Geometry.

Publications and preprints:
Tropical correspondence for smooth del Pezzo log Calabi-Yau pairs, J. Alg. Geom. 31 (2022) 4, arXiv:2005.14018, 687–749, 2020.
Theta functions, broken lines and 2-marked log Gromov-Witten invariants, arXiv:2204.12257, 2022.
The proper Landau-Ginzburg potential is the open mirror map (with Helge Ruddat and Eric Zaslow), Adv. Math. 447 (2024), 109639, arXiv:2204.12249, 2022.
Counting (tropical) curves via scattering.sage, arXiv:2210.10455, 2022.
Scattering diagrams: polynomiality and the dense region (with Patrick Luo), arXiv:2312.13990, 2023.
Gromov-Witten invariants and mirror symmetry for non-Fano varieties using scattering diagrams (with Per Berglund and Michael Lathwood), arXiv:2404.16782, 2024.

Theses:
Doctoral thesis: Tropical correspondence for smooth del Pezzo log Calabi-Yau pairs, 2020.
Master thesis: Tropicalization of the Lines on the Dwork Pencil if Quintic Threefolds, 2017.

Sage codes:
scattering.sage: A sage code computing scattering diagrams and wall structures in the Gross-Siebert program.

Contact:
E-Mail: graefnitz(at)math(dot)uni-hannover(dot)de