Amenable Groups and Invariant Means
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M. Foreman
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Article
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1994
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Elsevier Science
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English
β 778 KB
Banach showed in 1923 that Lebesgue measure is not the unique rotation invariant finitely additive probability measure on the measurable subsets of \(S^{1}\). Margulis and Sullivan (for \(n \geqslant 4\) ) and Drinfield (for \(n=2,3\) ) independently showed that Lebesgue measure is the unique isomet