B. Sc. (May-1993) in Mathematics, Rank First, Very Good with honor degree, Mansoura University, Egypt. M. Sc. (November-1997) in Mathematics (Differential Equations), Mansoura University, Egypt. Title: Oscillation of Solutions of Delay Differential Equations Ph. D. (December 2002) in Mathematics, Adam Mickiewicz University, Poznan, Poland. Title: Oscillation Theory of Delay Differential and Difference Equations and Some of Their Applications.
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