1. Guangxi Colleges and Universities Key Laboratory of Complex System Optimization, and Big Data Processing, Yulin Normal University, Yulin 537000, Guangxi, China
2. Department of Mathematics, Nanjing University, Nanjing, Jiangsu, 210093, China
3. Jagiellonian University in Kraków, Faculty of Mathematics and Computer Science, ul. Lojasiewicza 6, 30-348 Kraków, Poland
4. Faculty of Applied Mathematics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
5. Department of Mathematics, University of Craiova, Street A.I. Cuza 13, 200585 Craiova, Romania
6. Technische Universität Berlin, Institut für Mathematik, Straße des 17. Juni 136, 10623 Berlin, Germany