Author/Authors :
Callialp، F نويسنده 1Department of Mathematics, Beykent University, Ayazaga-Maslak, 34396, Istanbul, Turkey , , Tekir، U نويسنده 2Department of Mathematics, Marmara University, Ziverbey, P.K.34722, G?ztepe, Istanbul, Turkey , , Ulucak، G نويسنده 3Department of Mathematics, Gebze Institute of Technology, P.K.141 41400 Gebze-Kocaeli, Turkey ,