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JSYML
2006
60views more  JSYML 2006»
14 years 10 months ago
Counterexamples to the unique and cofinal branches hypotheses
Abstract. We produce counterexamples to the unique and cofinal branches hypotheses, assuming (slightly less than) the existence of a cardinal which is strong past a Woodin cardinal...
Itay Neeman, John R. Steel
JSYML
2006
43views more  JSYML 2006»
14 years 10 months ago
Hyperfine structure theory and gap 1 morasses
Abstract. Using the Friedman-Koepke Hyperfine Structure Theory of [2], we provide a short construction of a gap 1 morass in the constructible universe.
Sy-David Friedman, Peter Koepke, Boris Piwinger
60
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JSYML
2000
85views more  JSYML 2000»
14 years 10 months ago
The Logic of Choice
The choice construct (choose x : '(x)) is useful in software speci cations. We study extensions of rst-order logic with the choice construct. We prove some results about Hilb...
Andreas Blass, Yuri Gurevich
JSYML
2000
69views more  JSYML 2000»
14 years 10 months ago
Topological Elementary Equivalence of Closed Semi-Algebraic Sets in The Real Plane
We investigate topological properties of subsets S of the real plane, expressed by first-order logic sentences in the language of the reals augmented with a binary relation symbol...
Bart Kuijpers, Jan Paredaens, Jan Van den Bussche
JSYML
2000
56views more  JSYML 2000»
14 years 10 months ago
Computability over The Partial Continuous Functionals
We show that to every recursive total continuous functional there is a representative of in the hierearchy of partial continuous functionals such that is S1 - S9 computable ov...
Dag Normann