پديدآورندگان :
Moradi Abbas amoradi@shirazu.ac.ir Department of Mathematics, College of Sciences, Shiraz University, Shiraz, Iran;
, Hedayatian Karim hedayati@shirazu.ac.ir Department of Mathematics, College of Sciences, Shiraz University, Shiraz, Iran; , Khani Robati Bahram bkhani@shirazu.ac.ir Department of Mathematics, College of Sciences, Shiraz University, Shiraz, Iran;