Affiliation: | 1. Faculdade de Matemática, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, Avenida Augusto corrêa 01, 66075-110, Belém, PA, Brazil;2. Departamento de Matemática, Instituto de Matemática e Estatística, Universidade de São Paulo, Rua do Matão 1010, 05508-090, São Paulo, SP, Brazil;1. Institute of Applied Mathematics, University of Economics Ho Chi Minh City, 59C, Nguyen Dinh Chieu Street, District 3, Ho Chi Minh City, Viet Nam;2. Department of Mathematics Education, Sangmyung University, Seoul, 03016, Republic of Korea;3. Technische Universität Berlin, Institut für Mathematik, Straße des 17. Juni 136, 10623 Berlin, Germany;4. School of Mathematics and Institute for Advanced Study in Mathematics, Harbin Institute of Technology, Harbin 150001, PR China |