Completed Projects

• Fresnel wavelets for coherent diffractive imaging (2011-2019)
  DFG project (subproject C11) within the CRC 755 (Nanoscale Photonic Imaging, second and third funding period)

Teaching

• Research seminar: Numerical Analysis (English) (SS 2021)
  Thursday 12.30 - 14.00, online (2 SWS)
  
• Exercises: Image and Geometry Processing II - Exercises, Mo 10-12 (English) (SS 2021)
  Monday, 10.15 - 11.45, online (2 SWS)
  
• Research seminar: Numerical Analysis (English) (WS 2020/2021)
  Thursday 12.30 - 14.00, online (2 SWS)
  
• Exercises: Image and Geometry Processing I - Exercises, Mi 10-12 (English) (WS 2020/2021)
  Wednesday, 10.15 - 11.45, online (2 SWS)
  
• Research seminar: Numerical Analysis (English) (SS 2020)
  Thursday 12.30 - 14.00, Seminarraum NAM (2 SWS)
  
• Exercises: Numerische Mathematik II - Übung (German) (SS 2020)
  Wednesday (2 SWS)
  
• Research seminar: Numerical Analysis (English) (WS 2019/2020)
  Thursday 12.30 - 14.00, Seminarraum NAM (2 SWS)
  
• Research seminar: Numerical Analysis (English) (SS 2019)
  Monday 14.15 - 15.45, MN 68 (2 SWS)
  
• Research seminar: Numerical Analysis (English) (WS 2018/2019)
  Thursday 12.30 - 14.00, Seminarraum NAM (2 SWS)
  
• Research seminar: Numerical Analysis (English) (SS 2018)
  Thursday 12.30 - 14.00, Seminarraum NAM (2 SWS)
  
• Research seminar: Numerical Analysis (English) (WS 2017/2018)
  Thursday 12.30 - 14.00, Seminarraum NAM (2 SWS)
  
• Research seminar: Numerical Analysis (English) (SS 2017)
  Thursday 12.30 - 14.00, Seminarraum NAM (2 SWS)
  
• Lab: Practical Course in Scientific Computing (SS 2017)
  By appointment (4 SWS)
  
• Research seminar: Numerical Analysis (English) (WS 2016/2017)
  Thursday 12.30 - 14.00, Seminarraum NAM (2 SWS)
  

Workshops

• 5th RTG Workshop 2020
  October 5-6, 2020 in Goettingen, Germany
• International Symposium SFB 755 Nanoscale Photonic Imaging
  March 26 - March 29, 2019 in Venice (Italy)
• 3rd Workshop of the RTG 2088 (Talk)
  September 24 - 26, 2018 in Bebra
• SFB 755 Spring School 2018
  April 5 - 6, 2018 in Kloster Drübeck
• SFB 755 Autumn School 2017 (Talk)
  October 12, 2017 in Göttingen
• 2nd Workshop of the RTG 2088 (Talk)
  September 25 - 27, 2017 in Eddigehausen
• Workshop Geomathematics Meets Medical Imaging (Talk)
  September 5 - 8, 2017 in Speyer
• Sampling Theory and Applications, 12th International Conference (Talk)
  July 3 - 7, 2017 in Tallinn
• Winter School 2017 of the CRC 755
  February 12 - 16, 2017 in Hirschegg, Kleinwalsertal

Publications

• Frame soft shrinkage operators are proximity operators
  Jakob Geppert, Gerlind Plonka
  Appl. Comput. Harmon. Anal. 57, 185–200, 2022 (preprint available at arXiv)
• Frame soft shrinkage as proximity operator
  Marzieh Hasannasab, Sebastian Neumayer, Gerlind Plonka, Simon Setzer, Gabriele Steidl, Jakob Geppert
  University of Göttingen, Institute for Numerical and Applied Mathematics, 2019 (preprint available at arXiv)
• Sparse Power Factorization: Balancing peakiness and sample complexity
  Dominik Stöger, Jakob Geppert, Felix Krahmer
  Advances in Computational Mathematics 45(3), 1711--1728, 2019 (preprint available at arXiv)
• Sparse Power Factorization With Refined Peakiness Conditions
  Dominik Stöger, Jakob Geppert, Felix Krahmer
  2018 IEEE Statistical Signal Processing Workshop (SSP), 2018 (See at IEEE Xplore)
• Refined performance guarantees for Sparse Power Factorization
  Jakob Geppert, Felix Krahmer, Dominik Stöger
  2017 International Conference on Sampling Theory and Applications (SampTA), 2017 (See at IEEE Xplore)