Department of Mathematics 

  College of Science P.O. Box 36

  Sultan Qaboos University

  Muscat 123

  Sultanate of Oman 

  Tel: +968 2414 1421

  Mobile: +968 92669753

  Fax: +968 24413415

Emails: 

naov2020@squ.edu.om

naov2020@gmail.com

albaali@squ.edu.om