Professor Rihan was graduated his B.Sc. from Alexandria University in 1986 with grade excellent with honor. We was then appointed as lecturer in Mathematics Department, Helwan University. He received his M.Sc in Numerical Analysis in 1992. He got his PhD from Manchester University in 2000. We was appointed as Post Doctorates in Manchester University from 2000-2003. He moved to Salford University from 2033-2006. He move to Helwan University as a Professor of Mathematics. He is now at UAE University as associate professor. Professor Rihan publish a lot of research papers in the filed of Biomathematics, and Numerical Analysis. He supervised a number of MSc and PhD student. He is PI of may research projects and editor in may scientific journals.