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The extensional realizability model of continuous functionals and three weakly non-constructive classical theorems (1502.02388v2)

Published 9 Feb 2015 in cs.LO and math.LO

Abstract: We investigate wether three statements in analysis, that can be proved classically, are realizable in the realizability model of extensional continuous functionals induced by Kleene's second model $K_2$. We prove that a formulation of the Riemann Permutation Theorem as well as the statement that all partially Cauchy sequences are Cauchy cannot be realized in this model, while the statement that the product of two anti-Specker spaces is anti-Specker can be realized.

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