Muhammad Irfan Siddique
Department of Mathematics, Allama Iqbal Open University Islamabad, Pakistan
Muhammad Faisal Iqbal
Department of Mathematics, Allama Iqbal Open University Islamabad, Pakistan
Tahir Mahmood
Department of Mathematics, International Islamic university Islamabad Pakistan
Qaisar Khan
Department of Pure and Applied Mathematics, University of Haripur, Haripur KPK, Pakistan