1. Department of Applied Mathematics, Faculty of Mathematical Sciences University of Tabriz Tabriz Iran
2. Department of Mathematics, Faculty of Education Erciyes University 38039‐Melikgazi‐Kayseri Turkey
3. Division of Applied Mathematics Brown University 170 Hope St Providence 02906 RI USA
4. Department of Mechanical Engineering, College of Engineering University of Zakho Zakho Iraq
5. Department of Mechanical Engineering Urmia University of Technology Urmia Iran