| Institution: | 1. School of Mathematics and Statistics, Northeast Normal University, Changchun 130024, PR China;2. Department of Mathematics, Champlain College Saint-Lambert, Saint-Lambert, Quebec, J4P 3P2, Canada;3. Department of Mathematics and Statistics, McGill University, Montreal, Quebec, H3A 2K6, Canada;1. University of Campinas (UNICAMP), Department of Applied Mathematics, IMECC, 13083-859, Brazil;2. Universidad Pedagógica y Tecnológica de Colombia, School of Mathematics and Statistics, 150003, Colombia;3. ICT - UNIFAL, Cidade Universitária, BR 267 Km 533 Rodovia José Aurélio Vilela, Poço de Caldas, Alfenas, MG, Brazil |
