The Twenty-first Katowice–Debrecen Winter Seminar on Functional Equations and Inequalities was held in Hotel Kotarz in Brenna, Poland, from February 2 to February 5, 2022. The meeting was organized by the Institute of Mathematics of the University of Silesia. 11 participants came from the University of Debrecen (Hungary), 7 from
the University of Silesia in Katowice (Poland), 2 from the Pedagogical University
of Krakow (Poland), 1 from Budapest University of Technology and Economics (Hungary), 1 from the University of Rzeszów (Poland) and 1 with a dual affiliation University of Silesia (Poland) and Chernivtsi National University (Ukraine)
