Prof. Dr. Dieter Spreen (Uni Siegen in Germany, 4 months in 2017 and 2018 and 2022)
Prof. Dr.-math. Friedhelm Meyer auf der Heide (Uni Paderborn in Germany, 1 month, 2017)
Prof. Dr. Pieter Collins (Uni Maastricht in Netherlands, 1 month, 2017)
Prof. Dr. Michal Konečný (Aston University in UK, 1 month, 2017)
Apl. Prof. Dr. Norbert Müller (Uni Trier in Germany, 3 months in 2017 and 2019 and 2024)
M. Sc. Eike Neumann (Aston University in UK, 2 months in 2017)
M. Sc. Holger Thies (Tokyo University, 1 month in 2017)
Dr. Svetlana Selivanova (Sobolev Institute of Mathematics in Russia, 1 week in 2017 before joining the lab)
Prof. Dr. Chee Yap (Courant Institute of Mathematical Science at New York University in U.S.A., 1 week in 2018)
Prof. Dr. Fritz Mayer-Lindenberg (Uni Hamburg-Harburg in Germany, 2 months in 2018 and 2019)
Prof. Dr. Helmut Schwichtenberg (LMU Munich in Germany, 2 months in 2018 and 2020)
Prof. Dr. Hajime Ishihara (JAIST, 1 month in 2018)
B.Sc. Christopher Fichtlsherer (Uni Hamburg in Germany, 1 month in 2018)
Dr. Gleb Pogudin (Courant Institute of Mathematical Science at New York University in U.S.A., 1 week in 2018)
M. Sc. Franz Brausse (Uni Trier in Germany, 1 month in 2019)
Dr. Sabrina Ouazzani (École Politechnique in France, 1 week in 2019)
Dr. Eike Neumann (Aston University in UK, 1month in 2019)