Welcome!
I am a postdoctoral researcher working in the group of Robert Weismantel at the Department of Mathematics at the ETH Zürich. Prior to that, I obtained my PhD from the Technische Universität Berlin under the supervision of Martin Henk in 2023. My research interests include Mathematical Programming, Convex/Discrete Geometry, and Combinatorics. Some topics I have worked on are concerned with the influence of bounded subdeterminants in discrete optimization.
Preprint
- M. Celaya, S. Kuhlmann, and R. Weismantel. Polynomial Matrices in Integer Programming With Restricted Subdeterminants, submitted, 2026.
Publications
- S. Kuhlmann and R. Weismantel. A Threshold Phenomenon for the Shortest Lattice Vector Problem in the Infinity Norm, IPCO, Best Paper Award, 2026.
A full version can be found here. - S. Kuhlmann, T. Oertel, and R. Weismantel. Sparse Approximation in Lattices and Semigroups, Mathematical Programming Series B, 2026.
An extended abstract appeared at IPCO, 2025. - S. Kuhlmann. Integer Carathéodory results with bounded multiplicity, Beiträge zur Algebra und Geometrie/Contributions to Algebra and Geometry, 2025.
- M. Celaya, S. Kuhlmann, and R. Weismantel. On Matrices over a Polynomial Ring with Restricted Subdeterminants, IPCO, 2024.
- I. Aliev, M. Henk, M. Hogan, S. Kuhlmann, and T. Oertel. New Bounds for the Integer Carathéodory Rank, SIAM Journal on Optimization, 2024.
- M. Celaya, S. Kuhlmann, J. Paat, and R. Weismantel. Proximity and Flatness Bounds for Linear Integer Optimization, Mathematics of Operations Research, 2024.
- M. Henk, S. Kuhlmann, and R. Weismantel. On Lattice Width of Lattice-Free Polyhedra and Height of Hilbert Bases, SIAM Journal on Discrete Mathematics, 2022.
- M. Celaya, S. Kuhlmann, J. Paat, and R. Weismantel. Improving the Cook et al. Proximity Bound Given Integral Valued Constraints, IPCO, 2022.
Thesis & More
- S. Kuhlmann. On the Impact of Bounded Minors in Integer Programming, at Technische Universität Berlin, published online, 2023
- J. Schmitt, G. Bérczi, J. Dekoninck, J. Feusi, T. Gehrunger, et al. IMProofBench: Benchmarking AI on Research-Level Mathematical Proof Generation, 2025