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nlin.AO2004
On Persistence and Stability of some Biological Systems with Cross Diffusion
E. Ahmed, A. S. Hegazi, A. S. Elgazzar
The concept of cross diffusion is applied to some biological systems. The conditions for persistence and Turing instability in the presence of cross diffusion are derived. Many exa…
math.QA2004
Group-cograded multiplier Hopf (*-)algebras
A. T. Abd El-hafez, L. Delvaux, A. Van Daele
Let be a group and assume that is a family of algebras with identity. We have a {\it Hopf -coalgebra} (in the sense of Turaev) if, for each pair ,…