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Slides - Institut for Matematik - Aarhus Universitet

Slides - Institut for Matematik - Aarhus Universitet

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Dekomposition og beregningKlassisk gaelder (hvis I og J er idealer):◮ V(I)∩V(J) = V(I + J)◮ V(I)∪V(J) = V(I ∩ J)Heraf følger:◮ T(I)∩T(J) = T(I + J)◮ T(I)∪T(J) = T(I ∩ J)Man kan beregne T(I) med algebraiske metoder.En tilnærmelse fåes ved:f ∈ I⇒ T(I) ⊆ T(〈f〉)daT(I)∩T(〈f〉) = T(I +〈f〉) = T(I).

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