منابع مشابه
Formal Completions and Idempotent Completions of Triangulated Categories of Singularities
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For an o-minimal expansion R of a real closed field and a set V of Th(R)-convex valuation rings, we construct a “pseudo completion” with respect to V . This is an elementary extension S of R generated by all completions of all the residue fields of the V ∈ V , when these completions are embedded into a big elementary extension of R. It is shown that S does not depend on the various embeddings u...
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For every ring R, we present a pair of model structures on the category of pro-spaces. In the first, the weak equivalences are detected by cohomology with coefficients in R. In the second, the weak equivalences are detected by cohomology with coefficients in all R-modules (or equivalently by pro-homology with coefficients in R). In the second model structure, fibrant replacement is essentially ...
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A μ-algebra is a model of a first order theory that is an extension of the theory of bounded lattices, that comes with pairs of terms (f, μx.f) where μx.f is axiomatized as the least prefixed point of f , whose axioms are equations or equational implications. Standard μ-algebras are complete meaning that their lattice reduct is a complete lattice. We prove that any non trivial quasivariety of μ...
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ژورنال
عنوان ژورنال: Journal of Geometry
سال: 2011
ISSN: 0047-2468,1420-8997
DOI: 10.1007/s00022-011-0073-3