Affiliation: | 1. Department of Mathematics, Texas A&M University-Kingsville, Kingsville, TX, 78363, USA 2. NAAM Research Group, King Abdulaziz University, 21589, Jeddah, Saudi Arabia 3. School of Mathematics, Statistics and Applied Mathematics, National University of Ireland, Galway, Ireland 4. Plovdiv University, Tzar Asen 24, Plovdiv, 4000, Bulgaria
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