1. Department of Mathematics; Madanapalle Institute of Technology and Science; Madanapalle -517325 India
2. Department of Mathematics; Jawaharlal Nehru Technological University Anantapuram; Anantapuram -515002 India
3. Gort Engovation Research (Aerospace); 15 Southmere Avenue Great Horton, Bradford BD7 3NU West Yorkshire UK
4. Department of Civil Engineering; Jawaharlal Nehru Technological University Anantapuram; Anantapuram -515002 India