Noetherian Schemes over abelian symmetric monoidal categories

preprint2016arXivOpen access

Abstract

In this paper, we develop basic results of algebraic geometry over abelian symmetric monoidal categories. Let AA be a commutative monoid object in an abelian symmetric monoidal category (C,⊗,1)(\mathbf C,\otimes,1) satisfying certain conditions and let E(A)=HomA−Mod(A,A)\mathcal E(A)=Hom_{A-Mod}(A,A). If the subobjects of AA satisfy a certain compactness property, we say that AA is Noetherian. We study the localisation of AA with respect to any s∈E(A)s\in \mathcal E(A) and define the quotient A/IA/\mathscr I of AA with respect to any ideal I⊆E(A)\mathscr I\subseteq \mathcal E(A). We use this to develop appropriate analogues of the basic notions from usual algebraic geometry (such as Noetherian schemes, irreducible, integral and reduced schemes, function field, the local ring at the generic point of a closed subscheme, etc) for schemes over (C,⊗,1)(\mathbf C,\otimes,1) . Our notion of a scheme over a symmetric monoidal category (C,⊗,1)(\mathbf C,\otimes,1) is that of Toën and Vaquié.

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