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» The Medvedev lattice of computably closed sets
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AML
2006
83views more  AML 2006»
13 years 4 months ago
The Medvedev lattice of computably closed sets
Simpson introduced the lattice P of 0 1 classes under Medvedev reducibility. Questions regarding completeness in P are related to questions about measure and randomness. We presen...
Sebastiaan Terwijn
CCA
2009
Springer
13 years 11 months ago
Weihrauch Degrees, Omniscience Principles and Weak Computability
Abstract. In this paper we study a reducibility that has been introduced by Klaus Weihrauch or, more precisely, a natural extension of this reducibility for multi-valued functions ...
Vasco Brattka, Guido Gherardi
LMCS
2006
79views more  LMCS 2006»
13 years 4 months ago
Computably Based Locally Compact Spaces
tract Stone Duality) is a re-axiomatisation of general topology in which the topology on a space is treated, not as an infinitary lattice, but as an exponential object of the same...
Paul Taylor 0002
TACAS
2009
Springer
134views Algorithms» more  TACAS 2009»
13 years 11 months ago
Computing Weakest Strategies for Safety Games of Imperfect Information
CEDAR (Counter Example Driven Antichain Refinement) is a new symbolic algorithm for computing weakest strategies for safety games of imperfect information. The algorithm computes ...
Wouter Kuijper, Jaco van de Pol
ICFCA
2009
Springer
13 years 11 months ago
Yet a Faster Algorithm for Building the Hasse Diagram of a Concept Lattice
Formal concept analysis (FCA) is increasingly applied to data mining problems, essentially as a formal framework for mining reduced representations (bases) of target pattern famili...
Jaume Baixeries, Laszlo Szathmary, Petko Valtchev,...