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2013 | OriginalPaper | Chapter

A Planar Borel Set Which Divides Every Non-negligible Borel Product

Author : Michel Émery

Published in: Séminaire de Probabilités XLV

Publisher: Springer International Publishing

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Abstract

In the unit square [0, 1] ×[0, 1] endowed with the Lebesgue measure λ, we construct a Borel subset A with the following property: if U and V are any two non-negligible Borel subsets of [0, 1], then \(0 <\lambda {\bigl ( A \cap (U \times V )\bigr )} <\lambda (U \times V )\).

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Footnotes
1
All linear notions (dimension, rank, independence) are understood with \(\mathbb{F}\) as the field of scalars.
 
2
A weaker hypothesis suffices, namely, for each i ∈ r there is at least one h ∈ H with \(h \cap r =\{ i\}\).
 
Literature
1.
go back to reference C. Dellacherie, M. Émery, Filtrations indexed by ordinals; application to a conjecture of S. Laurent. Séminaire de Probabilités XLV, Springer Lecture Notes in Mathematics, vol. 2078 (Springer, Berlin, 2013), pp. 141–157 C. Dellacherie, M. Émery, Filtrations indexed by ordinals; application to a conjecture of S. Laurent. Séminaire de Probabilités XLV, Springer Lecture Notes in Mathematics, vol. 2078 (Springer, Berlin, 2013), pp. 141–157
2.
go back to reference J. Neveu, Mathematical Foundations of the Calculus of Probability (Holden-Day, San Francisco, 1965) J. Neveu, Mathematical Foundations of the Calculus of Probability (Holden-Day, San Francisco, 1965)
Metadata
Title
A Planar Borel Set Which Divides Every Non-negligible Borel Product
Author
Michel Émery
Copyright Year
2013
Publisher
Springer International Publishing
DOI
https://doi.org/10.1007/978-3-319-00321-4_5