| Institution: | 1. Continentale Krankenversicherung a.G., Ruhrallee 94, 44139 Dortmund, Germany;2. Faculty of Mathematics, Bielefeld University, PO Box 100 131, 33501 Bielefeld, Germany;1. Instituto de Matemática e Estatística, Universidade Federal Fluminense, Campus Gragoatá, Rua Alexandre Moura 8 - São Domingos, 24210-200 Niterói, Rio de Janeiro, Brazil;2. Dipartimento di Matematica e Informatica, Università di Ferrara, Via Machiavelli 30, 44121 Ferrara, Italy;1. University at Buffalo, the State University of New York, United States of America;2. Department of Mathematics, University at Buffalo, SUNY, Buffalo, NY 14260, United States of America;1. Universidad Arturo Prat, Facultad de Ciencias, Instituto de Ciencias Exactas y naturales, Casilla 121, Iquique, Chile;2. Univ. Artois, UR 2462, Laboratoire de Mathématiques de Lens (LML), F-62300 Lens, France;3. Universidad de Talca, Instituto de Matemáticas, Casilla 721, Talca, Chile |
