پديدآورندگان :
MAHDAVI R. R.Mahdavi@edu.ikiu.ac.ir, Department of Pure Mathematics, Faculty of Science, Imam Khomeini International University, Postal Code:34149-16818, Qazvin, Iran. , RAZANI A. razani@sci.ikiu.ac.ir Department of Pure Mathematics, Faculty of Science, Imam Khomeini International University, Postal Code:34149-16818, Qazvin, Iran.