1. University of Mosul College of Computers Sciences and Mathematic,Department of Mathematics,Mosul,Iraq
2. Ministry of Education of Iraq, Apartment of Nineveh,Mosul,Iraq
3. Sultan Zainal Abidin University, Kuala,Faculty of Informatics and Computing,Terengganu,Malaysia
4. Bayero University Kano,Faculty of Physical Sciences,Department of Mathematical Sciences,Kano,Nigeria