Properties of the Class of Measure Separable Compact Spaces

Details Properties of the Class of Measure Separable Compact Spaces Properties of the Class of Measure Separable Compact Spaces

1994-08-09

arxiv.org/abs/math/9408201v1

Mathematics

Logic

Scientific paper

We investigate properties of the class of compact spaces on which every regular Borel measure is separable. This class will be referred to as MS. We discuss some closure properties of MS, and show that some simply defined compact spaces, such as compact ordered spaces or compact scattered spaces, are in MS. Most of the basic theory for regular measures is true just in ZFC. On the other hand, the existence of a compact ordered scattered space which carries a non-separable (non-regular) Borel measure is equivalent to the existence of a real-valued measurable cardinal less or equal to c. We show that not being in MS is preserved by all forcing extensions which do not collapse omega_1, while being in MS can be destroyed even by a ccc forcing.

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