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Around cofin

We show the consistency of "there is a nice sigma --ideal I on the reals with add(I)= omega_1 which cannot be represented as the union of a strictly increasing sequence of length omega_1 of sigma-subideals". This answers a question by Borodulin-Nadzieja and Glab.

4 nodes3 linksoverview mapAround cofin
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4 nodes3 links
Around cofin4 visible / 4 total nodes / 4 links
Co-authorshipAuthorshipAuthorshipTopic signalWAround cofinpreprint / 2013AAndrzej RoslanowskiResearcherASaharon ShelahResearcherTmath.LO1661 works
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Around cofin

preprint / 2013

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