Journal of Symbolic Logic

A continuous movement version of the Banach—Tarski paradox: A solution to de Groot's Problem

Trevor M. Wilson

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Abstract

In 1924 Banach and Tarski demonstrated the existence of a paradoxical decomposition of the 3-ball B, i.e., a piecewise isometry from B onto two copies of B. This article answers a question of de Groot from 1958 by showing that there is a paradoxical decomposition of B in which the pieces move continuously while remaining disjoint to yield two copies of B. More generally, we show that if n ≥ 2, any two bounded sets in 𝑹ⁿ that are equidecomposable with proper isometries are continuously equidecomposable in this sense.

Article information

Source
J. Symbolic Logic Volume 70, Issue 3 (2005), 946-952.

Dates
First available in Project Euclid: 22 July 2005

Permanent link to this document
https://projecteuclid.org/euclid.jsl/1122038921

Digital Object Identifier
doi:10.2178/jsl/1122038921

Mathematical Reviews number (MathSciNet)
MR2155273

Zentralblatt MATH identifier
1134.03028

Citation

Wilson, Trevor M. A continuous movement version of the Banach—Tarski paradox: A solution to de Groot's Problem. J. Symbolic Logic 70 (2005), no. 3, 946--952. doi:10.2178/jsl/1122038921. https://projecteuclid.org/euclid.jsl/1122038921.


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Journal of Symbolic Logic

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