By S. Elaydi, R Abu Saris, M. Saleh, S K Jain, E. S. Titi

This quantity comprises the complaints of the 3rd foreign Palestinian convention, held in Bethlehem in 2000. The papers conceal quite a lot of components in arithmetic and arithmetic schooling. there's emphasis on utilized arithmetic, together with partial differential equations, dynamical structures, and distinction equations. different parts represented contain algebra and quantity idea, information, and matters in arithmetic schooling.

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Let C and D be coalgebras. The right C-comodules together with the C-colinear maps between them constitute an additive category denoted by Mc. Analogously, the categories of left C-comodules CM and of C-D-bicomodules C D M are defined. These comodule categories are additive categories, but need not be abelian, due to the lack of exactness of the tensor bifunctor —

D. 8(3). 9. ([10, Proposition 3(4)]; An integral domain is a PVD if and only if for every a,b £ R, either a | b or b | ac for every nonunit c of R. • . 10. 9], also see [9, Proposition 5]j. / / a pseudo-valuation domain R has a nonzero principal prime ideal, then R is a valuation domain. • . 11. 10];. Let (R,M) be a quasilocal domain with quotient field K which is not a valuation domain. a pseudo-valuation domain if and only if M _1 Then R is = {x € K : xM C R} is a valuation domain with maximal ideal M.

14]/ Let I be a powerful ideal of an integral domain R, and suppose that P