Institution: | 1. Institute of Mathematics, University of Warsaw, ul. Banacha 2, 02-097 Warszawa, Poland;2. Institute of Mathematics, Polish Academy of Sciences, ul. ?niadeckich 8, 00-956 Warszawa, Poland;3. Budapest University of Technology and Economics, MTA-BME Stochastics Research Group, P.O. Box 91, 1521 Budapest, Hungary |