| Affiliation: | 1. Department of Mathematics, Sir Wilfred Grenfell College, Memorial University of Newfoundland, Corner Brook, Canada;2. Department of Mathematics and Computing Science, Saint Mary''s University, Halifax, Canada;3. Department of Mathematics, Furman University, Greenville, U.S.A.;1. Shri Vaishnav Vidyapeeth Vishwavidyalaya, Indore, MP 453111, India;2. SAGE University, Indore, MP 452001, India;3. Mody University of Science and Technology, Lakshmangarh, Sikar, Rajasthan 332311, India;1. Department of Mathematics, Shaanxi Normal University, Xi’an 710062, PR China;2. School of Applied Mathematics, Central University of Finance and Economics, Beijing 100081, PR China;3. School of Mathematics and Statistics, Nanyang Normal University, Nanyang 473061, PR China;1. Mathematical Institute, LMU Munich, Germany;2. Institute of Mathematics, Physics and Mechanics, Ljubljana, Slovenia;3. Faculty of Mathematics and Physics, University of Ljubljana, Slovenia;4. Faculty of Natural Sciences and Mathematics, University of Maribor, Slovenia;5. Science Institute, University of Iceland, Reykjavik, Iceland |
