Affiliation: | (1) Università di Roma “La Sapienza”, Dipartimento di Informatica e Sistemistica, Via Buonarroti 12, I-00185 Roma, Italy, e-mail: soler@peano.dis.uniroma1.it, IT;(2) CSIRO Mathematical and Information Science, Private Bag 2, Glen Osmond, SA 5064, Australia, Houyuan, e-mail: Jiang@cmis.CSIRO.au, AU;(3) School of Mathematics, Department of Applied Mathematics, University of New South Wales, Sydney, NSW 2052, Australia, e-mail: l.qi@unsw.edu.au, AU |