مؤلف: Andrzej Rucinski

SVANTE JANSON, Ph D, is Professor of Mathematics at Uppsala University, Sweden. TOMASZ LUCZAK, Ph D, is Professor of Mathematics at Adam Mickiewicz University, Poland, and a visiting professor at Emory University, Atlanta, Georgia. ANDRZEJ RUCINSKI, Ph D, is Professor of Mathematics at Adam Mickiewicz University and a visiting professor at Emory University.