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ACS
2006
13 years 11 months ago
Universality of Coproducts in Categories of Lax Algebras
Abstract. Categories of lax (T, V )-algebras are shown to have pullbackstable coproducts if T preserves inverse images. The general result not only gives a common proof of this pro...
Mojgan Mahmoudi, Christoph Schubert, Walter Tholen
ACS
2006
13 years 11 months ago
Absolute Lax 2-categories
We have introduced, in a previous paper, the fundamental lax 2-category of a `directed space' X. Here we show that, when X has a T1-topology, this structure can be embedded i...
Marco Grandis
ACS
2006
13 years 11 months ago
Fully Coprime Comodules and Fully Coprime Corings
Prime objects were defined as generalization of simple objects in the categories of rings (modules). In this paper we introduce and investigate what turns out to be a suitable gen...
Jawad Y. Abuhlail
ACS
2007
13 years 11 months ago
Choiceless, Pointless, but not Useless: Dualities for Preframes
We provide the appropriate common ‘(pre)framework’ for various central results of domain theory and topology, like the Lawson duality of continuous domains, the Hofmann–Lawso...
Marcel Erné
ACS
2007
13 years 11 months ago
A Topologist's View of Chu Spaces
Abstract. For a symmetric monoidal-closed category X and any object K, the category of K-Chu spaces is small-topological over X and small cotopological over Xop . Its full subcateg...
Eraldo Giuli, Walter Tholen
ACS
2007
13 years 11 months ago
Conway's Question: The Chase for Completeness
Dikran Dikranjan, Elena Martín Peinador, Va...
ACS
2007
13 years 11 months ago
Axioms for Sequential Convergence
: It is of general knowledge that those (ultra)filter convergence relations coming from a topology can be characterized by two natural axioms. However, the situation changes consi...
Gonçalo Gutierres, Dirk Hofmann
ACS
2007
13 years 11 months ago
More on Configurations in Priestley Spaces, and Some New Problems
Abstract. Prohibiting configurations (≡ induced finite connected posets) in Priestley spaces and properties of the associated classes of distributive lattices, and the related ...
Richard N. Ball, Ales Pultr, Jirí Sichler
ACS
2007
13 years 11 months ago
Algebra and Geometry of Rewriting
We present various results of the last twenty years converging towards a homotopical theory of computation. This new theory is based on two crucial notions : polygraphs (introduce...
Yves Lafont