editors of the volume: Paweł Gładki (Institute of Mathematics, University of Silesia, Katowice, Poland), Jochen Koenigsmann (Mathematical Institute, Radcliffe Observatory Quarter, University of Oxford, Oxford, UK), Przemysław Koprowski (Institute of Mathematics, University of Silesia, Katowice, Poland), Wiesław Kubiś (Institute of Mathematics, Czech Academy of Sciences, Prague, Czech Republic), Radan Kučera (Faculty of Science, Masaryk University, Brno, Czech Republic), Franz-Viktor Kuhlmann (Institute of Mathematics, University of Szczecin, Szczecin, Poland), Ladislav Mišík (Department of Mathematics, University of Ostrava, Ostrava 1, Czech Republic)
Warszawa: Institute of Mathematics, Polish Academy of Sciences, 2020
