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ACS
2004
13 years 11 months ago
On Hereditary Coreflective Subcategories of Top
Let A be a topological space which is not finitely generated and CH(A) denote the coreflective hull of A in Top. We construct a generator of the coreflective subcategory SCH(A) con...
Martin Sleziak
ACS
2004
13 years 11 months ago
Components of the Fundamental Category
Inthis article westudy the fundamental category (Goubault and Raussen, 2002 Goubault, 2002) of a partially ordered topological space (Nachbin, 1965 Johnstone, 1982), as arising in ...
Lisbeth Fajstrup, Martin Raußen, Eric Goubau...
ACS
2004
13 years 11 months ago
Pointfree Spectra of Riesz Spaces
One of the best ways of studying ordered algebraic structures is through their spectra. The three well-known spectra usually considered are the Brumfiel, Keimel, and the maximal sp...
M. Mehdi Ebrahimi, A. Karimi, Mojgan Mahmoudi
ACS
2004
13 years 11 months ago
Residually Small Varieties Without Rank
Subdirect representations are investigated in varieties which are defined by operations of not necessarily finite arity. It is shown that, in this context, Birkhoff's Subdire...
Hans-E. Porst
ACS
2004
13 years 11 months ago
One Setting for All: Metric, Topology, Uniformity, Approach Structure
For a complete lattice V which, as a category, is monoidal closed, and for a suitable Setmonad T we consider (T, V)-algebras and introduce (T, V)-proalgebras, in generalization of...
Maria Manuel Clementino, Dirk Hofmann, Walter Thol...
ACS
2004
13 years 11 months ago
Effective Descent Morphisms in Categories of Lax Algebras
Abstract. In this paper we investigate effective descent morphisms in categories of reflexive and transitive lax algebras. We show in particular that open and proper maps are effec...
Maria Manuel Clementino, Dirk Hofmann
ACS
2004
13 years 11 months ago
Simplicial Cohomology with Coefficients in Symmetric Categorical Groups
In this paper we introduce and study a cohomology theory {Hn(-, A)} for simplicial sets with coefficients in symmetric categorical groups A. We associate to a symmetric categorical...
Pilar Carrasco, Juan Martínez-Moreno
ACS
2004
13 years 11 months ago
Descent Theory for Schemes
In this paper we continue the investigation of some aspects of descent theory for schemes that was begun in [11]. Let SCH be a category of schemes. We show that quasi-compact pure ...
Bachuki Mesablishvili