1. Department of Mathematics, Bharath Institute of Higher Education and Research, Chennai 600073, India
2. Department of Mathematics, Government Arts College, Ariyalur, Affiliated to Bharathidasan University, Thiruchirappalli 621713, India
3. Department of Mathematics and Statistics, American University of Sharjah, Sharjah 26666, United Arab Emirates
4. Department of Mathematics, Academy of Maritime Education and Training (AMET) Deemed to be University, Chennai 603112, India
5. School of Chemistry and AMBER National Centre, University of Dublin, Trinity College Dublin, D02 PN40 Dublin, Ireland