Professor at the Institute of Computer Science of the Polish Academy of Science. Working in the fileds of discrete mathematics, combinatirics, nonlinear analysis, mathematical economcis, and game theory.
Professor at the Cardinal Stefan Wyszyński University in Warsaw (Poland) and at the Institute of Mathematics of the Czech Academy of Sciences (Czech Republic). His research interests include applications of logic and set theory in functional analysis and topology.
Professor at the Institute of Mathematics of the Polish Academy of Science. Working in the fileds of differential equations and functional analysis.