Tim A. Werthmann, M.Sc.

Preprints and Publications

• L. Grasedyck, T. A. Werthmann
  Computing tensor operator exponentials within low-rank tensor formats with application to the parameter-dependent multigrid method
  In: PAMM 22: e202200093 (2023)
• A. Rörich, T. A. Werthmann, D. Göddeke, L. Grasedyck
  Bayesian inversion for electromyography using low-rank tensor formats
  In: Inverse Problems 37.5 (2021)
• L. Grasedyck, M. Klever, C. Löbbert, T. A. Werthmann
  A parameter-dependent smoother for the multigrid method
  Forthcoming in International Journal of Computing and Visualization in Science and Engineering, 2019.

Research Interests

• Low-rank tensor formats
• Multigrid methods for parameter-dependent problems
• High-dimensional problems in medical applications, for example, parameter-dependent EEG leadfield matrices
• Fast C++ implementation of iterative solvers in hierarchical tensor formats

Travel and Talks

• 3th to 5th April 2024
       Co-Organizer and Participant at The ABCs of Sparsity and Singular Structures
• 26th to 29th February 2024
       Participant at the Symposium on Sparsity and Singular Structures 2024
• 13th to 15th September 2023
       Organizer of and Speaker at the 10th Workshop on Matrix Equations and Tensor Techniques (METT X)
• 20th to 25th August 2023
       Speaker at the ICIAM 2023 Tokyo
• 22th to 26th May 2023
       Participant in the Spring School on Sparsity and Singular Structures 2023
• 15th to 19th August 2022
       Speaker at the GAMM Annual Meeting 2022
• 9th to 10th September 2021
       Speaker at the Matrix Equations and Tensor Techniques IX (METTIX)
• 24th to 28th February 2020
       Research visit at the University of Stuttgart, where I presented a talk about "Low-rank tensor methods for the electromyographic problem"
• 6th to 8th November 2019
       Speaker at the METT VIII - 8th Workshop on Matrix Equations and Tensor Techniques, where I presented the following slides
• 17th to 30th June 2019
       Participant in the Gene Golub SIAM Summer School 2019
• 4th to 8th March 2019
       Participant in the Winterschool on Hierarchical Matrices 2019

Teaching

• Summer semester 2024
       Mathematisches Praktikum as Assistant, Examiner, and Lecturer
  
• Winter semester 2023/24
       Functional Analysis as Assistant
  
• Summer semester 2023
       Mathematisches Praktikum as Assistant, Examiner, and Lecturer
  
• Winter semester 2022/23
       Functional Analysis as Assistant
  
     Supervision of a Bachelor seminar

• Summer semester 2022
       Mathematisches Praktikum as Assistant, Examiner, and Lecturer
  
• Winter semester 2021/22
       Functional Analysis as Assistant
  
     Supervision of a Master seminar

• Summer semester 2021
       Mathematisches Praktikum as Assistant, Examiner, and Lecturer
  
• Winter semester 2020/21
       Functional Analysis as Assistant
  
• Summer semester 2020
       Mathematisches Praktikum as Assistant, Examiner, and Lecturer
       Supervision of a Bachelor thesis
  
• Winter semester 2019/20
       Mathematics I (f. Civil Engineers a.o.) as Assistant
       Supervision of two Bachelor seminars
  
     Supervision of a Master seminar

• Summer semester 2019
       Mathematics II (f. Civil Engineers a.o.) as Assistant

Education

• Master of Science in Mathematics at RWTH Aachen
       Thesis title: Multiparametric Representation of EEG Leadfield Matrices
       Supervisor: Prof. Dr. Lars Grasedyck
• Bachelor of Science in Mathematics at RWTH Aachen
       Thesis title: An Efficient Method for Binary Classification by means of Logistic Regression and Tensor Format Representation
       Supervisor: Prof. Dr. Mike Espig