About the Authors

Usama H. Hegazy

Department of Mathematics, Faculty of Science, Al-Azhar University, P.O. Box 1277, Gaza, Palestine

Helmy F. Alsultan

Department of Mathematics, Faculty of Science, Al-Azhar University, P.O. Box 1277, Gaza, Palestine

Corresponding Author

Email: u.hejazy@alazhar.edu.ps, uhijazy@yahoo.com