Affiliation: | 1. Department of Mathematics & Statistics, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia;2. Department of Mathematics, Statistics and Physics, Qatar University, Doha, Qatar;3. DST‐NRF Centre of Excellence in Mathematical and Statistical Sciences and Centre for Differential Equations, Continuum Mechanics and Applications, University of the Witwatersrand, Johannesburg, South Africa |