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Logic Journal of IGPL Advance Access originally published online on March 6, 2008
Logic Journal of IGPL 2008 16(3):269-273; doi:10.1093/jigpal/jzn006
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Indecomposability of R and R \ {0} in Constructive Reverse Mathematics

Iris Loeb

Department of Mathematics and Statistics, University of Canterbury, Private Bag 4800, Christchurch, New Zealand. E-mail: I.Loeb{at}math.canterbury.ac.nz

It is shown that—over Bishop's constructive mathematics—the indecomposability of R is equivalent to the statement that all functions from a complete metric space into a metric space are sequentially nondiscontinuous. Furthermore we prove that the indecomposability of R \ {0} is equivalent to the negation of the disjunctive version of Markov's Principle. These results contribute to the programme of Constructive Reverse Mathematics.

Key Words: Indecomposability • Constructive Reverse Mathematics • Continuity Principles • Disjunctive Version of Markov's Principle

Received for publication 7 September 2007.

References

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This Article
Right arrow Abstract Freely available
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
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Right arrow Email this article to a friend
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Right arrow Articles by Loeb, I.
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