Sciweavers

CIE
2009
Springer
14 years 5 months ago
Notes on the Jump of a Structure
We introduce the notions of a complete set of computably infinitary Π0 n relations on a structure, of the jump of a structure, and of admitting nth jump inversion.
Antonio Montalbán
CIE
2009
Springer
14 years 5 months ago
Index Sets and Universal Numberings
This paper studies the Turing degrees of various properties defined for universal numberings, that is, for numberings which list all partial-recursive functions. In particular pro...
Sanjay Jain, Frank Stephan, Jason Teutsch
CIE
2009
Springer
14 years 5 months ago
Equivalence Relations on Classes of Computable Structures
Abstract. If L is a finite relational language then all computable Lstructures can be effectively enumerated in a sequence {An}n∈ω in such a way that for every computable L-st...
Ekaterina B. Fokina, Sy-David Friedman
CIE
2009
Springer
14 years 5 months ago
Computational Heuristics for Simplifying a Biological Model
Abstract. Computational biomodelers adopt either of the following approaches: build rich, as complete as possible models in an effort to obtain very realistic models, or on the co...
Ion Petre, Andrzej Mizera, Ralph-Johan Back
CIE
2009
Springer
14 years 5 months ago
Dialectica Interpretation with Fine Computational Control
This paper is an attempt to refine Hernest’s [2] extension of Berger’s uniform quantifiers [1] to G¨odel’s functional (Dialectica) interpretation [3]. We consider the poss...
Trifon Trifonov
CIE
2009
Springer
14 years 5 months ago
Numberings and Randomness
Abstract. We prove various results on effective numberings and Friedberg numberings of families related to algorithmic randomness. The family of all Martin-L¨of random left-compu...
Paul Brodhead, Bjørn Kjos-Hanssen
CIE
2009
Springer
14 years 5 months ago
On Generating Independent Random Strings
It is shown that from two strings that are partially random and independent (in the sense of Kolmogorov complexity) it is possible to effectively construct polynomially many strin...
Marius Zimand
CIE
2009
Springer
14 years 5 months ago
On Stateless Multicounter Machines
We investigate the computing power of stateless multicounter machines with reversal-bounded counters. Such a machine has m-counters operating on a one-way input delimited by left a...
Ömer Egecioglu, Oscar H. Ibarra