Affiliation: | 1. Department of Mathematical Sciences, Sharif University of Technology, Tehran, Iran;2. Department of Mathematics, College of Sciences, Yasouj University, Yasouj, 75918-74934, Iran;1. School of Mathematics and Computer Science, Wuhan Textile University, Wuhan, 430200, PR China;2. School of Mathematics and Statistics & Hubei Key Laboratory of Mathematical Sciences, Central China Normal University, Wuhan, 430079, PR China |