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LIFSCHITZ REALIZABILITY AS A TOPOLOGICAL CONSTRUCTION

Published online by Cambridge University Press:  08 January 2021

MICHAEL RATHJEN
Affiliation:
SCHOOL OF MATHEMATICS UNIVERSITY OF LEEDSLEEDS, UKE-mail: [email protected]
ANDREW W. SWAN
Affiliation:
DEPARTMENT OF PHILOSOPHY CARNEGIE MELLON UNIVERSITYPITTSBURGH, USAE-mail: [email protected]

Abstract

We develop a number of variants of Lifschitz realizability for $\mathbf {CZF}$ by building topological models internally in certain realizability models. We use this to show some interesting metamathematical results about constructive set theory with variants of the lesser limited principle of omniscience including consistency with unique Church’s thesis, consistency with some Brouwerian principles and variants of the numerical existence property.

Type
Articles
Copyright
© The Association for Symbolic Logic 2021

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References

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