Stefan Kohl
| May 11, 2023 | Talk entitled An introduction to GAP with an emphasis on residue-class-wise affine groups at the One-day workshop on mathematical chemistry in the memory of Ali Reza Ashrafi at Shahid Rajaee Teacher Training University (online). |
| October 15 - 24, 2022 | Invited visit at IPM Isfahan / Iran. * |
| September 22, 2022 | Workshop Introduction to GAP at IPM Isfahan (online). |
| September 13, 2022 | Talk entitled A group theoretic equivalent of the Collatz conjecture at IPM Isfahan (online). |
| February 21, 2021 | Q&A session on the computer algebra system GAP at the 51st Annual Iranian Mathematics Conference in Kashan (online), and membership in the academic committee of that conference. |
| August 15 - 23, 2019 | Participation in the GAP-Singular-Meeting at the PfalzAkademie in Lambrecht (Pfalz) / Germany, and talk entitled A class of infinite permutation groups which permits computation. * |
| December 7 - 8, 2018 | Participation in the Nikolaus Conference 2018 at the RWTH Aachen. * |
| January 12 - 14, 2017 | Participation in the Workshop on Permutation Groups: Methods and Applications at the University of Bielefeld. * |
| December 9 - 10, 2016 | Participation in the Nikolaus Conference 2016 at the RWTH Aachen. * |
| August 7 - 12, 2015 | Lecturer of a course Introduction to GAP with an emphasis on automorphisms of finite groups at Dogus University in Istanbul, mainly for faculty and PhD students from various universities in Turkey; participation in a subsequent workshop Finite Groups and their Automorphisms. * |
| December 5 - 6, 2014 | Participation in the Nikolaus Conference 2014 at the RWTH Aachen, and talk entitled What do Thompson's group V and the Collatz conjecture have in common?. * |
| August 25 - 29, 2014 | Participation in the GAP Days 2014 at the RWTH Aachen. * |
| April 1 - 5, 2014 | Participation in the conference Ischia Group Theory 2014 in Italy, and talk entitled A group action on Z^2 exhibiting fractal-like patterns. * |
| March 24 - 28, 2014 | Participation in the workshop Asymptotic Properties of Infinite Groups at Institut Henri Poincare in Paris / France. * |
| December 7 - 8, 2012 | Participation in the Nikolaus Conference 2012 at the RWTH Aachen. * |
| December 10 - 11, 2010 | Participation in the Nikolaus Conference 2010 at the RWTH Aachen. * |
| June 24 - 27, 2010 | Participation in the conference ACA 2010 - Applications of Computer Algebra in Vlora / Albania. Organization of a session on Computational group theory with talks by Max Horn (Germany), Vasyl Alex Ustimenko (Poland), Ekaterina Khrebtova (Russia, Dubai), Thomas Bier (Oman), Sandeep Rajkumar Murthy (Great Britain) and Urszula Romanczuk (Poland). (Jointly with Dmitry Malinin). |
| December 20, 2009 | Talk entitled Groups generated by class transpositions - results and open problems in the colloquium UV Algebra Winter Conference 2009 at the University of Vlora / Albania. |
| November 10, 2009 | Talk entitled Open problems on groups generated by involutions interchanging residue classes of the integers in the mathematics colloquium at the University of Vlora / Albania. |
| August 1 - 15, 2009 | Participation in the conference Groups St Andrews 2009 in Bath / England and talk entitled Simple groups generated by involutions interchanging residue classes of the integers. * |
| February 12, 2009 | Seminar talk entitled A simple group generated by involutions interchanging residue classes of the integers at the University of Vlora / Albania. |
| December 7 - 9, 2007 | Participation in the Nikolaus Conference 2007 at the RWTH Aachen and talk entitled Residue-class-wise affine permutations of Z^2. * |
| September 11 - 15, 2007 | Participation in the GAP Package Authors Workshop at the Technische Universität Braunschweig and talk entitled Computing in a class of infinite permutation groups. * |
| November 7, 2006 | Invited talk on the Computational Algebra Day at the Vrije Universiteit Brussel (Belgium), entitled A new class of groups accessible to methods from computational group theory. * |
| October 6, 2006 | Invited talk at the National University of Ireland, Galway (blackboard talk, no slides). * |
| April 11, 2006 | Invited talk at the Ecole Polytechnique Federale de Lausanne (Switzerland), entitled A class of infinite permutation groups which are accessible to computational investigations (blackboard talk, no slides). * |
| March 8, 2006 | Invited talk at the University of Bielefeld, entitled A countable highly transitive simple group containing Collatz' permutation (blackboard talk, no slides). * |
| December 8 - 10, 2005 | Participation in the Darstellungstheorie-Tage / Nikolaus Conference 2005 in Aachen and talk entitled On a class of infinite permutation groups. * |
| July 30 - August 6, 2005 | Participation in the conference Groups St Andrews 2005 in St Andrews / Scotland and talk entitled Residue-class-wise affine groups. * |
| December 10 - 11, 2004 | Participation in the Nikolaus Conference 2004 at the RWTH Aachen and talk entitled On the structure of the group of all residue-class-wise affine permutations of the integers. * |
| December 5 - 6, 2003 | Participation in the Nikolaus Conference 2003 at the RWTH Aachen. * |
| June 1 - 6, 2003 | Participation in the conference Combinatorial, Geometric and Dynamical Aspects of Infinite Groups in Gaeta / Italy. * |
| December 6 - 7, 2002 | Participation in the Nikolaus Conference 2002 at the RWTH Aachen and talk entitled Classifying finite simple groups with at most 17 orbits under automorphisms. * |
| November 8 - 9, 2002 | Participation in the Darstellungstheorie-Tage 2002 in Kassel and talk entitled Restklassenweise affine Darstellungen von Gruppen. * |
| December 7 - 8, 2001 | Participation in the Nikolaus Conference 2001 at the RWTH Aachen. * |
| August 28, 2001 | Talk in St Andrews / Scotland entitled `Residue-class-wise affine representations of groups'. * |
| August 5 - 18, 2001 | Participation in the conference Groups St Andrews 2001 in Oxford / England and talk entitled Residue-class-wise affine representations of groups. |
| July 23 - 26, 2001 | Participation in the workshop Finitely Presented Groups: Questions and Algorithms in Trento / Italy. * |
| December 7 - 9, 2000 | Participation in the Darstellungstheorie-Tage 2000 in Aachen and talk entitled Number of orbits on simple groups under automorphisms. * |
| February 18, 2000 | Talk on the seminar GGT Würzburg-Stuttgart in Würzburg, entitled Über die Anzahl der Bahnen auf endlichen Gruppen unter der Operation ihrer Automorphismengruppe - Suzuki-Gruppen vs. lineare Gruppen. |
| April 6 - 10, 1999 | Participation in the Workshop on Advanced Programming in GAP in Linz / Austria and talk entitled Integer factorization. |
| November 25 - 28, 1998 | Participation in the SUNCAGe98 (Workshop on Application of Computer Algebra to Group Theory and Finite Geometries) in Caserta / Italy. |
*) I acknowledge financial support by the organizers, respectively the refund of travel expenses by the inviting institution.