پديدآورندگان :
Taghavi Ali Taghvi@umz.ac.ir Department of Mathematics, Faculty of Mathematical Sciences,
University of Mazandaran, Babolsar, Iran; , Hosseinzadeh Roja ro.hosseinzadeh@umz.ac.ir Department of Mathematics, Faculty of Mathematical Sciences,
University of Mazandaran, Babolsar, Iran; , Sharifi Ilnaz ilishmt@gmail.com Department of Mathematics, Faculty of Mathematical Sciences,
University of Mazandaran, Babolsar, Iran;