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Transactions of the American Mathematical Society

ISSN 1088-6850(online) ISSN 0002-9947(print)

 

 

A $ 5-r$ uniqueness theorem


Author: Jessie Ann Engle
Journal: Trans. Amer. Math. Soc. 201 (1975), 89-104
MSC: Primary 28A70
MathSciNet review: 0355009
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Abstract: A Borel-regular Carathéodory outer measure $ \Lambda $ on a separable metric space $ X$, where $ \Lambda $ is invariant with respect to a family $ H$ of homeomorphisms from $ X$ onto $ X$, is unique if $ \Lambda $ satisfies a $ 5$ - $ r$ condition at one point in $ X$ and if $ H$ satisfies Condition I, a condition much weaker than, but related to, the invariance of distance under $ H$.


References [Enhancements On Off] (What's this?)

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DOI: https://doi.org/10.1090/S0002-9947-1975-0355009-3
Article copyright: © Copyright 1975 American Mathematical Society