1987 | OriginalPaper | Buchkapitel
A Characteristic Property of Atomic Measures with Finitely Many Atoms Resp. Atomless Measures
verfasst von : Detlev Plachky
Erschienen in: Contributions to Stochastics
Verlag: Physica-Verlag HD
Enthalten in: Professional Book Archive
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It is proved that a finite measure on a σ-algebra is atomic with a finite number of atoms if and only if there does not exist a {0,1}-valued pure charge on the same σ-algebra whose system of zero sets is larger than the family of zero sets of the finite measure. Furthermore, an example is given which shows that there exists a {0,1}-valued pure charge whose system of zero sets is not larger than the family of zero sets of any finite measure. Finally it is proved that a finite measure on a σ-algebra is atomless if and only if the support of the regular Borel measure of the corresponding Stone representation does not contain a σ-additive measure.