| Affiliation: | 1. Institute of Mathematics, State Academy of Sciences, Pyongyang, Democratic People''s Republic of Korea;2. PGItech Corp., Pyongyang, Democratic People''s Republic of Korea;3. Department of Mathematics, University of Paris VIII, F-93526 Saint-Denis, France;4. University Sorbonne Paris Cité, LAGA, UMR 7539, CNRS, 93430 Villetaneuse, France;5. Télécom Paris, 91120 Palaiseau, France;1. Department of Mathematical Sciences, University of Delaware, Newark, DE, USA;2. Department of Informatics, University of Bergen, Bergen, Norway;3. Department of Mathematics, University of Trento, Trento, Italy;1. Dipartimento di Matematica e Informatica, Università degli Studi di Perugia, Italy;2. Department of Mathematics and Statistics, University of South Florida, Tampa, FL 33620, USA;1. Dipartimento di Matematica e Informatica, Università degli Studi di Perugia, Italy;2. Dipartimento di Matematica, Informatica ed Economia, Università degli Studi della Basilicata, Italy;1. Faculty of Mathematics and Statistics, Hubei Key Laboratory of Applied Mathematics, Hubei University, Wuhan 430062, China;2. School of Mathematics and Statistics, Carleton University, Ottawa, Ontario, K1S 5B6, Canada;1. Institute of Mathematics, State Academy of Sciences, Pyongyang, Democratic People''s Republic of Korea;2. PGItech Corp., Pyongyang, Democratic People''s Republic of Korea;3. LAGA, Department of Mathematics, University of Paris VIII, 93526 Saint-Denis, France;4. University of Paris XIII, CNRS, LAGA UMR 7539, Sorbonne Paris Cite, 93430 Villetaneuse, France;5. Telecom ParisTech, 75013 Paris, France;1. Gongqing College, Nanchang University, Jiujiang 332020, China;2. Faculty of Mathematics and Statistics, Hubei University, Wuhan 430062, China;3. School of Information Engineering, Nanchang University, Nanchang 330031, China |
