1. Research Scholar, Department of Mathematics , Rayalaseema Univesity Kurnool - 518002 , A.P., India
2. Department of Mathematics , K.L. University Vaddeswaram, Guntur - 522502 , A.P. India
3. Department of Mathematics , JNTUA College of Engineering Pulivendula Pulivendula - 516 390 A.P. India