[1] PG and Research Department of Mathematics, Cauvery College for Women (Affiliated to Bharathidasan University), Tamil Nadu, Trichy,620 018, India
[2] Department of Mathematics, Saveetha Engineering College (Autonomous), Tamil Nadu, Chennai,602 105, India
[3] PG and Research Department of Mathematics, Khadir Mohideen College (Affiliated to Bharathidasan University), Tamil Nadu, Adirampattinam,614701, India
[4] Department of Physics, Loyola College, Tamil Nadu, Chennai,600034, India