Contact
Office Hours
In April 2024, I started a position at RWTH Aachen.
Subject
Researching PDE eigenvalue problems, asymptotic analysis of expanding domains, directional homogenization, preconditioners for eigenvalue algorithms, preconditioners for linear solvers, spectral coarse spaces for domain decomposition, and Galerkin methods for moment models in rarefied gas modelling.
- Theisen, L., & Stamm, B. (2023). A Scalable Two-Level Domain Decomposition Eigensolver for Periodic Schrödinger Eigenstates in Anisotropically Expanding Domains. https://doi.org/10.48550/arXiv.2311.08757
- Stamm, B., & Theisen, L. (2022). A Quasi-Optimal Factorization Preconditioner for Periodic Schrödinger Eigenstates in Anisotropically Expanding Domains. SIAM Journal on Numerical Analysis, 60(5), Article 5. https://doi.org/10.1137/21m1456005
- Theisen, L., & Stamm, B. (2022). ddEigenLab.jl: Domain-Decomposition Eigenvalue Problem Lab. Zenodo. https://doi.org/10.5281/zenodo.6576197
- Theisen, L., & Torrilhon, M. (2021). fenicsR13: A Tensorial Mixed Finite Element Solver for the Linear R13 Equations Using the FEniCS Computing Platform. ACM Trans. Math. Softw., 47(2), Article 2. https://doi.org/10.1145/3442378
- Theisen, L., & Torrilhon, M. (2020). fenicsR13: A Tensorial Mixed Finite Element Solver for the Linear R13 Equations Using the FEniCS Computing Platform. Zenodo. https://doi.org/10.5281/zenodo.4172951
- WS22: Assistant for Höhere Mathematik 1 für Ingenieure (higher mathematics 1 for engineers) @ LExMath - Lehrexportzentrum Mathematik, University of Stuttgart, with Prof. Stroppel
- SS22: Assistant for Mathematical aspects in computational chemistry @ ACoM, RWTH Aachen, with Prof. Stamm
- WS21: Assistant for Mathematische Grundlagen III (CES) @ MathCCES, RWTH Aachen, with Prof. Torrilhon & Prof. Krumscheid
- WS20: Assistant for Mathematische Grundlagen III (CES) @ MathCCES, RWTH Aachen, with Prof. Stamm & Prof. Hakon Hoel
- SS20: Assistant for Mathematische Grundlagen IV (CES) @ MathCCES, RWTH Aachen, with Prof. Stamm & Prof. Krumscheid
- WS19/20: Assistant for Mathematische Grundlagen I (CES) @ MathCCES, RWTH Aachen, with Prof. Stamm & Prof. Krumscheid
- SS19: Tutor for Mathematische Grundlagen IV (CES) @ MathCCES, RWTH Aachen
- WS18/19: Tutor for Partielle Differentialgleichungen (CES) @ MathCCES, RWTH Aachen
Education
- 10/19 – now: PhD Student @ RWTH Aachen University, Aachen, Germany
- 10/14 – 04/18: Bachelor of Science in Computational Engineering Science (CES) @ RWTH Aachen University, Aachen, Germany
- 04/18 – 09/19: Master of Science in Computational Engineering Science (CES) @ RWTH Aachen University, Aachen, Germany
Professional
- 10/22 – now: Research Assistant @ Chair of Numerical Mathematics for High Performance Computing (NMH/IANS), University of Stuttgart
- 10/19 – 09/22: Research Assistant @ MathCCES / Applied and Computational Mathematics, RWTH Aachen
- 10/17 – 03/18: Internship about 3D CFD Simulation and Hexahedral Meshing @ ABB Corporate Research Center Baden-Dättwil, Switzerland
- 08/15 – 10/15: Working Student in IT and EDV Systems @ Sanofi, Frankfurt am Main, Germany
- 07/14 – 10/14: Working Student in Export & Dispatch @ Sanofi, Frankfurt am Main, Germany