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On the radical of multigraded modules

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arxiv 1210.2026 v1 pith:OAEOL65L submitted 2012-10-07 math.AC

On the radical of multigraded modules

classification math.AC
keywords functormodulesradicalcategoryidealmonomialalexanderauslander-reiten
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We define a functor $\rr^\ast$ from the category of positively determined modules to the category of squarefree modules which plays the role of passing from a monomial ideal to its radical. By using this functor, we generalize several results on properties that are shared by a monomial ideal and its radical. Moreover, we study the connection of $\rr^\ast$ to the Alexander duality and Auslander-Reiten translate functor.

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