[1] Cleveland State Univ, Dept Mech Engn, Cleveland, OH 44114 USA
[2] Kuvempu Univ, Dept Studies & Res Math, Shimoga 577451, Karnataka, India
[3] AIMS Inst, Deparment Math, Bangalore 560058, Karnataka, India
[4] Bangalore Univ, Dept Math, Bangalore, Karnataka, India
[5] Govt Sci Coll, Dept Math, Hassan, Karnataka, India