This image shows Lambert Theisen

Lambert Theisen

M.Sc.

PhD student, research assistant
Institute of Applied Analysis and Numerical Simulation
Numerical Mathematics for High Performance Computing

Contact

+49 711 685 65522
 +4971168565507
Website

Pfaffenwaldring 57
70569 Stuttgart
Germany
Room: 7.154

Office Hours

Wednesday 11:00 - 12:00 am.

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.

  1. Theisen, L., & Stamm, B. (2022). ddEigenLab.jl: Domain-Decomposition Eigenvalue Problem Lab. Zenodo. https://doi.org/10.5281/zenodo.6576197
  2. 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
  3. 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
  4. 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
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