The PFA(S)[S] conjecture on first-countable perfect pre-images of
The PFA(S)[S] conjecture on first-countable perfect pre-images of
Let be a first-countable perfect pre-image of , and let denote the stated forcing axiom and its associated extension.
PFA(S)[S] conjecture. Under , every first-countable perfect pre-image of includes a copy of .
The conjecture would sharpen the paper's consistency results involving hereditary normality by allowing “copy of ” to replace “perfect pre-image of .” The source also mentions an unpublished theorem of the author related to this claim, but the supplied text gives no resolution of the conjecture.
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Sources & referencesView supporting material
Primary source
Franklin D. Tall, “PFA(S)[S] and Locally Compact Normal Spaces”, arXiv:1104.3471 (2011).
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