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- - Functions have exactly one incoming and exactly one outgoing edge.- A function is always followed by an event and vice versa. - Functions usually do not follow each other directly- Trivial events (simple events) can be deleted if this improves the readability of the model. In this case, two functions may follow each other.
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- E = IK[X] et IKn[X]={P∈E I deg(P) ⩽ n} pour n∈IN. Soit B un polynôme de degré n+1. Notons F = B.IK[X] = {A.B I A∈IK[X]} (c'est l'ensemble des multiples de B). Montrer que F⊕IKn[X] = E