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APAL
1998
56views more  APAL 1998»
13 years 6 months ago
Turing Degrees of Certain Isomorphic Images of Computable Relations
A model is computable if its domain is a computable set and its relations and functions are uniformly computable. Let A be a computable model and let R be an extra relation on the ...
Valentina S. Harizanov
APAL
1998
71views more  APAL 1998»
13 years 6 months ago
Splitting Theorems and the Jump Operator
We investigate the relationship of (jumps of) the degrees of splittings of a computably enumerable set and the degree of the set. We prove that there is a high computably enumerab...
Rodney G. Downey, Richard A. Shore
APAL
1998
71views more  APAL 1998»
13 years 6 months ago
On the Finiteness of the Recursive Chromatic Number
A recursive graph is a graph whose vertex and edges sets are recursive. A highly recursive graph is a recursive graph that also has the following property: one can recursively det...
William I. Gasarch, Andrew C. Y. Lee