Affiliation: | (1) Department of Mathematics and Computing Science, Technical University of Eindhoven, P.O.Box 513, 5600 MB Eindhoven, The Netherlands;(2) Computer and Automation Institute, Hungarian Academy of Sciences, Lágymányosi u. 11, 1111 Budapest, Hungary;(3) Computer and Automation Institute, Hungarian Academy of Sciences, Lagymanyosi u. 11, 1111 Budapest, Hungary |