| Affiliation: | 1. S.I.S.S.A., Via Beirut 4, Trieste 34014, Italy;2. Department of Informatics, University of Oslo, P.O. Box 1080 Blindern, N-0314 Oslo, Norway;1. Unità INdAM, Università di Brescia, Via Branze 38, 25123 Brescia, Italy;2. Dipartimento di Matematica ed Applicazioni, Universitàa di Milano-Bicocca, Via Cozzi 55, 20125 Milano, Italy;1. National University of Uzbekistan, Tashkent, Uzbekistan;2. Pennsylvania State University, 76 University Drive, Hazleton, PA 18202, USA;1. Department of Mathematical Sciences, Norwegian University of Science and Technology, NO–7491 Trondheim, Norway;2. Institut für Mathematik, Julius-Maximilians-Universität Würzburg, Campus Hubland Nord, Emil-Fischer-Strasse 30, 97074, Würzburg, Germany |
