1. The University of Jordan,Department of Mathematics,Amman,Jordan
2. University of Larbi Ben M’hidi,Department of Mathematics and Computer Science,Oum El Bouaghi,Algeria
3. University of Larbi Ben M’hidi,Department of Material Sciences,Oum El Bouaghi,Algeria
4. Al Zaytoonah University of Jordan,Department of Mathematics,Amman,Jordan
5. University of Larbi Ben M’hidi,Laboratoire d’Electronique Avancée,Oum El Bouaghi,Algeria