| Affiliation: | 1. Institute of Mathematics and Mathematical Modeling, 125 Pushkin str., 050010;2. Al-Farabi Kazakh National University, 71 Al-Farabi ave., 050040 Almaty, Kazakhstan;3. Department of Mathematics: Analysis, Logic and Discrete Mathematics, Ghent University, 281 Krijgslaan, S8 9000 Ghent, Belgium;4. School of Mathematical Sciences, Queen Mary University of London, Mile End Rd, Stepney, London E1 4NS, United Kingdom;5. Laboratory of Analysis and Control of Partial Differential Equations, Djillali Liabes University, PO. Box 89, 22000 Sidi Bel Abbes, Algeria |
