Compatibility, Stability, and Sheaves
Integrates fundamental techniques from algebraic geometry, localization theory and ring theory, and demonstrates how each topic is enhanced by interaction with others, providing new results within a common framework. Technical conclusions are presented and illustrated with concrete examples.
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a-torsion Algebra AnneR(M arbitrary assertions are equivalent AssR(M assume bimodule biradical C~lR canonical centralizing extension clearly closed under taking commutative ring Corollary defined denote essential exact sequence exists finitely generated left following assertions functor Gabriel filter hence i?-bimodule idempotent implies induced injective hull isomorphism L G C(a left i?-module left i?-submodule left ideal left noetherian ring left second layer Lemma localization M/aM maximal ideal module morphism mutually compatible noetherian ring nonzero obviously open subsets P G Spec(R positive integer presheaf previous result prime ideals Proposition proves the assertion Qa(M Qa(R QaQT(M QT(M Qw(S R C S R-bimodule R-module radical in R—mod resp ring homomorphism satisfies the Artin-Rees satisfies the left satisfies the strong second layer condition sheaf sheaves Spec(R stable strong second layer strongly normalizing extension submodule surjective symmetric radical topology torsionfree twosided ideal verify X C Spec(R XR(I yields Zariski topology