Abstract
We prove the consistency of “ℬ/I mz does not split” (see Notation). We write the proof so that with the standard duality, also the consistency of “ℬ/I tc does not split” (i.e., replacing measure zero by first category, random by generic, etc.) is proved. The method is the oracle chain condition.
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The author would like to thank the NSF and BSF (United States-Israel Binational Science Foundation) for partially supporting this research.
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Shelah, S. Lifting problem of the measure algebra. Israel J. Math. 45, 90–96 (1983). https://doi.org/10.1007/BF02760673
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DOI: https://doi.org/10.1007/BF02760673