Simon Jacobsson

About me

I am a PhD student at KU Leuven. I do research at the intersection between numerical analysis and geometry. Right now, I am interested in fixed rank tensor manifolds. In my work, I look at them as quotients of Lie groups, with applications to for example tensor completion and dynamical low-rank approximation.

Links

Github
ORCiD
Google Scholar
KU Leuven who's who

Conferences

Invited to talk at the International Conference on Continuous Optimization (ICCOPT) in Los Angeles, July 2025.
Contributed talk at BIT'65 in Uppsala, January 2025.
Invited to talk at SIAM Conference on Applied Linear Algebra (SIAMLA) in Paris, May 2024.
Contributed talk at Pure and Applied Differential Geometry (PADGE) in Leuven, July 2023.
Contributed talk at the Conference of the International Linear Algebra Society (ILAS) in Madrid, June 2023.
Attended Algebraic Geometry with Applications to Tensors and Secants (AGATES) in Warsaw, November 2022.
Attended Mathematics of Complex Data in Stockholm, June 2022.

Workshops

Presented a poster at the Workshop on Low-Rank Models and Applications (LRMA) in Mons, September 2025.

Seminars

Talked at UC Louvain applied mathematics seminar, December 2025 (upcoming).
Talked at Vrije Universiteit Brussel geometry and statistics seminar, December 2025 (upcoming).
Talked at Norwegian University of Science and Technology differential equations and numerical analysis seminar, October 2025 (upcoming).
Talked at Chalmers University of Technology computational and applied mathematics seminar, February 2025.
Talked at KU Leuven geometry seminar, May 2024.
Talked at KU Leuven numerical analysis seminar, November 2023.

Software

Contributor to the Manifolds.jl library.
Author of the ManiFactor.jl library.

Refereeing

SIAM Journal on Matrix Analysis and Applications. (2 reviews)

Teaching

I have been TA for the following courses.

Complex analysis at KU Leuven for master students in mathematics engineering, 2023–2025.
Evolutionary algorithms at KU Leuven for master students in computer science, 2022–2025.
Numerical analysis at Chalmers for bachelor students in mathematics and physics engineering, 2021.
Complex analysis at Chalmers for bachelor students in mathematics and physics engineering, 2021.
Computational mathematics at Chalmers for bachelor students in civil engineering, 2021.
Linear algebra at Chalmers for bachelor students in computer science, 2021.
Calculus at Chalmers for bachelor students in electrical, chemical, and biological engineering, 2020–2021.

Preprints

[1] Simon Jacobsson, Lars Swijsen, Joeri Van der Veken, and Nick Vannieuwenhoven. Warped geometries of segre-veronese manifolds, 2024. [ bib | arXiv | http ]

Publications

[1] Simon Jacobsson, Raf Vandebril, Joeri Van der Veken, and Nick Vannieuwenhoven. Approximating maps into manifolds with lower curvature bounds. BIT Numerical Mathematics, 65(3):37, Aug 2025. [ bib | DOI | http ]
[2] Simon Jacobsson and Thomas Bäckdahl. Second order symmetry operators for the massive dirac equation. Classical and Quantum Gravity, 40(4):19, 2023. [ bib | http ]