Institution: | 1.Department of Mathematics, The University of Tampa, Tampa, FL, 33606-1490, USA ;2.Department of Mathematics, Zhejiang Normal University, Jinhua, 321004, Zhejiang, China ;3.Department of Mathematics, King Abdulaziz University, Jeddah, Saudi Arabia ;4.Department of Mathematics and Statistics, University of South Florida, Tampa, FL, 33620-5700, USA ;5.College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai, 200090, China ;6.College of Mathematics and Systems Science, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China ;7.Department of Mathematical Sciences, International Institute for Symmetry Analysis and Mathematical Modeling, North-West University, Mafikeng Campus, Mmabatho, 2735, South Africa ; |