[1] Govt Coll, Dept Math, Jaitwara 485221, Madhya Pradesh, India
[2] Natl Inst Technol, Dept Math, Warangal 506004, Telangana, India
[3] Sastra Univ, Dept Comp, Thanjavur 613401, Tamil Nadu, India
[4] Vilnius Gediminas Tech Univ, Inst Sustainable Construct, Sauletekio Ave 11, LT-10223 Vilnius, Lithuania
[5] Univ Molise, Dept Econ, Via Sanctis, I-86100 Campobasso, Italy
[6] Rajiv Gandhi Natl Inst Youth Dev, Adm Area, Sriperumbudur 602105, Tamil Nadu, India