Affiliation: | Department of Mathematical Analysis, Faculty of Mathematics and Physics, Charles University, Sokolovská 83, 186 75 Praha 8, Czech Republic; ENS Cachan Bretagne, IRMAR, CNRS, UEB, av. Robert Schuman, 35 170 Bruz, France; Institute of Information Theory and Automation of the ASCR, Pod Vodárenskou vě?í 4, 182 08 Praha 8, Czech Republic |