Tagged Questions
7
votes
1answer
90 views
Independence results that cannot be established by forcing.
I read the Wikipedia article on Absoluteness recently and found mention of Shoenfield’s Absoluteness Theorem, which states that if $ \phi $ is any $ \Sigma^{1}_{2} $- or $ \Pi^{1}_{2} $-sentence of ...
3
votes
0answers
433 views
Lists of open problems in set theory
Are there any publicly available lists of open problems in set theory besides the following ones? (And if so, what are they?)
http://www.math.wisc.edu/~miller/res/problem.pdf
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2
votes
0answers
198 views
Is there a ccc but not separable space $X$ with a zeroset-diagonal, that isn't submetrizable?
Is there a ccc but not separable space $X$ with a zeroset-diagonal, that isn't submetrizable?
separable = $X$ has a countable dense subset.
A space $X$ has a zeroset-diagonal when there is a ...
