Muhammad Usman1, Ahmet Yildirim2 and Syed Tauseef Mohyud-Din3*
1Department of Mathematics, University of Dayton, 300 College Park, Dayton, OH 45469-2316, USA.
2Department of Mathematics, Ege University, 35100 Bornova –Ä°zmir, Turkey.
3Department of Mathematics, HITEC University, Taxila Cantt, Pakistan.
Email: [email protected]