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» Non-branching degrees in the Medvedev lattice of Pi01 classe...
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JSYML
2007
79views more  JSYML 2007»
15 years 3 days ago
Non-branching degrees in the Medvedev lattice of Pi01 classes
Christopher P. Alfeld
87
Voted
AML
2006
83views more  AML 2006»
15 years 9 days 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 6 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