| Affiliation: | 1. Fakultät für Mathematik, Universität Wien, Nordbergstr. 15, 1090 Wien, Austria;2. Katholieke Universiteit Leuven, Campus Kortrijk, 8500 Kortrijk, Belgium;1. Faculty of Engineering, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium;2. Faculty of Mathematics and Computer Science, University of Bucharest, Str. Academiei 14, RO-010014 Bucharest 1, Romania;1. Department of Mathematics, Virginia Tech, Blacksburg, VA 24061, USA;2. Faculty of Professional Studies, University of Nordland, NO-8049 Bodø, Norway;3. Departamento de Matemática, Universidade de São Paulo, Brazil;1. Fakultät für Mathematik, Universität Bielefeld, 33501 Bielefeld, Germany;2. Department of Mathematics, Cleveland State University, Cleveland, OH 44115, USA |
