1. Research Scholar, University Department of Mathematics, B. R. A. Bihar University, Muzaffarpur, Bihar, India
2. P. G. Department of Physics, L. S. College, Muzaffarpur, B. R. A. Bihar University, Muzaffarpur, Bihar, India
3. P. G. Department of Mathematics, M. S. College, Motihari, B. R. A. Bihar University, Muzaffarpur, Bihar, India