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Mathematical Logic Quarterly
Article . 2018 . Peer-reviewed
License: CC BY NC
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Mathematical Logic Quarterly
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Article . 2018
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Connectedness of the continuum in intuitionistic mathematics

Authors: Mark Bickford;

Connectedness of the continuum in intuitionistic mathematics

Abstract

AbstractWorking in (Intuitionistic analysis) we prove a strong, constructive connectedness property of the continuum: for any non‐empty sets, A and B, if then is non‐empty. It is well known that the intuitionistic continuum is indecomposable: if and then or , but this property is essentially negative—equivalent to if A, B are non‐empty and then . Our connectedness property is positive; so, given , , and a witness to , to prove our theorem we must construct a real number . We can construct the needed real number using only Bishop's constructive mathematics () and a weak form of Brouwer's continuity principle (and the choice principles that come from the Brouwer‐Heyting‐Kolmogorov interpretation of quantifiers in constructive type theory). We also replace indecomposability by connectedness in some results of van Dalen that use additional intuitionistic axioms.

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Keywords

Intuitionistic mathematics, Constructive and recursive analysis

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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Average
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