| Institution: | 1. Department of Mathematics, Sun Yat-sen University, Guangzhou, 510275, China;2. Faculty of Information Technology, Macau University of Science and Technology, Macau, China;1. Institut für Mathematik, Freie Universität Berlin, Arnimallee 3, D-14195 Berlin, Germany;2. Institut für Mathematik, Johannes Gutenberg-Universität, Staudingerweg 9, D-55099 Mainz, Germany;1. Mathematics Teaching and Distance Learning Centre, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland;2. Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland |
