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» Luce's choice axiom
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CIE
2010
Springer
14 years 8 days ago
The Peirce Translation and the Double Negation Shift
We develop applications of selection functions to proof theory and computational extraction of witnesses from proofs in classical analysis. The main novelty is a translation of cla...
Martín Hötzel Escardó, Paulo Ol...
ACS
2010
13 years 7 months ago
Fibrations of Simplicial Sets
There are infinitely many variants of the notion of Kan fibration that, together with suitable choices of cofibrations and the usual notion of weak equivalence of simplicial sets, ...
Tibor Beke
APAL
2010
96views more  APAL 2010»
13 years 7 months ago
Light Dialectica revisited
We upgrade the light Dialectica interpretation [6] by adding two more light universal quantifiers, which are both semi-computational and semi-uniform and complement each other. An...
Mircea-Dan Hernest, Trifon Trifonov
BSL
2006
73views more  BSL 2006»
13 years 7 months ago
Nonstandard arithmetic and reverse mathematics
We show that each of the five basic theories of second order arithmetic that play a central role in reverse mathematics has a natural counterpart in the language of nonstandard ari...
H. Jerome Keisler
MLQ
2008
50views more  MLQ 2008»
13 years 7 months ago
Long Borel hierarchies
We show that there is a model of ZF in which the Borel hierarchy on the reals has length 2. This implies that 1 has countable cofinality, so the axiom of choice fails very badly i...
Arnold W. Miller