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» Non-branching degrees in the Medvedev lattice of Pi01 classe...
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JSYML
2007
79views more  JSYML 2007»
14 years 10 months ago
Non-branching degrees in the Medvedev lattice of Pi01 classes
Christopher P. Alfeld
AML
2006
83views more  AML 2006»
14 years 11 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
15 years 5 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