Journal of the Egyptian Mathematical Society EDITORIAL BOARD Editor-in-Chief Co-Editor-in-Chief A.-S.F. Obada M. Asaad Al-Azhar University, Cairo, Egypt Cairo University, Cairo, Egypt E-mail:
[email protected] E-mail:
[email protected] Associate Editors M. E. Abd El-Monsef E. H. Doha M. S. Moslehian Tanta University, Tanta, Egypt Cairo University, Cairo, Egypt Ferdowsi University of Mashhad, Iran E-mail:
[email protected] E-mail:
[email protected] E-mail:
[email protected], M. M. A. Ahmed A. M. El-Sayed
[email protected] Al-Azhar University, Cairo, Egypt Banha University, Egypt S. H. Saker E-mail:
[email protected], E-mail:
[email protected], Mansoura University, Egypt
[email protected] [email protected] E-mail:
[email protected], S. M. El-Sayed A. Ballester-Bolinches
[email protected] Alexandria University, Egypt Universitat de Vale` ncia, Moline, Spain C. Tunc E-mail:
[email protected], E-mail:
[email protected] Yuzuncu Yil University, Turkey
[email protected] E-mail:
[email protected], H. Barakat A. Facchini
[email protected] Zagazig University, Zagazig, Egypt University of Padova, Italy E-mail:
[email protected] E-mail:
[email protected] M. Bohner M. A. Helal Missouri S&T, Rolla, MO 65409, USA Cairo University, Cairo, Egypt E-mail:
[email protected] E-mail:
[email protected] Managing Editor M. Abdel Aty Sohag Univesity, Sohag, Egypt E-mail:
[email protected] Editors N. A. Abdel-All F. Ghaleb A. N. Skiba Assiut University, Assiut, Egypt Ain Sham University, Cairo, Egypt Francisk Skorina Gomel State University, Gomel, E-mail:
[email protected] E-mail:
[email protected] Belarus E-mail:
[email protected] M.