Janusz BrzdekJanusz Brzdek has published numerous papers on Ulam's type stability (e.g., of functional, difference, differential and integral equations), its applications and connections to other areas of mathematics. He has been editor of several books and specil volumes focused on such subjects. He was the chairman of the organizing and/or scientific committees of several conferences on Ulam's type stability and on functional equations and inequalities. Read More Read Less