H. Saberi Najafi

Department of Applied Mathematics, Faculty of Mathematical Sciences, University of Guilan, P.O. Box 41335-1914 Rasht, Iran

J. Pourqasem

Department of Computer Science, Faculty of Engineering, University of Guilan, P.O. Box 3756, Rasht, Iran

S.A. Edalatpanah

Department of Applied Mathematics, Faculty of Mathematical Sciences, University of Guilan, P.O. Box 41335-1914 Rasht, Iran