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Article . 1966
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Proceedings of the American Mathematical Society
Article . 1966 . Peer-reviewed
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Proceedings of the American Mathematical Society
Article . 1966 . Peer-reviewed
Data sources: Crossref
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The Boundary of the Range of a Vector Measure

The boundary of the range of a vector measure
Authors: Baumann, V.;

The Boundary of the Range of a Vector Measure

Abstract

Let (X, S) be a measure space, /aj (i = I , n) signed measures on (X, S). Then , = (j1A, * * *, jUn) is a (n-dimensional) vector measure on (X, S), u is finite and purely nonatomic if every ,A is finite and purely nonatomic, respectively. Consider the range of a finite ndimensional vector measure as a subset of the n-dimensional Euclidean space En. A. Liapounoff [4] and P. R. Halmos [2] have shown: (1) The range of a finite vector measure is closed, (2) the range of a finite and purely nonatomic vector measure is convex. For any (infinite) vector measure IA call R= {Iu(M): MES and ,u(M) finite } thefinite range of IA. Then it is an immediate consequence of (2) that (3) the finite range of a purely nonatomic vector measure is convex. Two simple examples due to R. Borges [1] however show that there are purely nonatomic as well as purely atomic vector measures the finite range of which is not closed: (a) S is the a-ring of the one-dimensional Lebesgue sets, I,u the Lebesgue measure and Iu2(M) =fM exp( -z2)dz, MES. The positive

Keywords

differentiation and integration, measure theory

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
bronze