[1] Bajkul Milani Mahavidyalaya, Dept Math, Medinipur 721655, India
[2] Univ 20, Fac Sci, Dept Phys, Aout 1955 Skikda, Skikda 21000, Algeria
[3] Univ Gour Banga, Dept Math, Malda 732103, India
[4] Umm Al Qura Univ, Coll Engn & Islamic Architecture, Mech Engn Dept, POB 5555, Mecca, Saudi Arabia