Satyanarayana Bhavanari1, Godloza Lungisile2 and Nagaraju Dasari3*
1Department of Mathematics, Acharya Nagarjuna University, Nagarjuna Nagar – 522 510, AP, India.
2Department of Mathematics, Walter Sisulu University, Umtata, South Africa.
3Department of Science and Humanities (Maths), HITS, Hindustan University, Padur, Chennai – 603 103, India.
Email: [email protected]