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» Prime models of computably enumerable degree
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APAL
2011
13 years 9 days ago
Upper bounds on ideals in the computably enumerable Turing degrees
We study ideals in the computably enumerable Turing degrees, and their upper bounds. Every proper Σ0 4 ideal in the c.e. Turing degrees has an incomplete upper bound. It follows t...
George Barmpalias, André Nies
DAC
2005
ACM
13 years 7 months ago
Prime clauses for fast enumeration of satisfying assignments to boolean circuits
Finding all satisfying assignments of a propositional formula has many applications in the design of hardware and software. An approach to this problem augments a clause-recording...
HoonSang Jin, Fabio Somenzi
JSYML
2008
89views more  JSYML 2008»
13 years 3 months ago
The degree spectra of homogeneous models
Much previous study has been done on the degree spectra of prime models of a complete atomic decidable theory. Here we study the analogous questions for homogeneous models. We say...
Karen Lange
TCS
2011
13 years 6 days ago
Computational processes, observers and Turing incompleteness
We propose a formal definition of Wolfram’s notion of computational process based on iterated transducers together with a weak observer, a model of computation that captures so...
Klaus Sutner