Editorial Advisory Board - Mathematics Prof. Dr. Hari Mohan Srivastava Ph.D., D.Sc. (h.c), D.Sc. (h.c.) Professor Emeritus, Department of Mathematics and Statistics, University of Victoria, Victoria, British Columbia V8W 3R4, Canada Professor Dr. Vishnu Narayan Mishra PhD (I.I.T. Roorkee) Professor & Head, Department of Mathematics Indira Gandhi National Tribal University, Lalpur, Amarkantak, 484 887 Madhya Pradesh, India E-mail : vnm@igntu.ac.in