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Danielle Ulrich's user avatar
Danielle Ulrich's user avatar
Danielle Ulrich's user avatar
Danielle Ulrich
  • Member for 12 years, 2 months
  • Last seen more than 1 year ago
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11
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question
19
What is the Cantor-Bendixson rank of the space of first order theories?
Apr 5, 2016
answer
16
Can an ultrapower be undone by forcing?
Dec 26, 2015
answer
16
Is there a theorem whose only known proof uses "$A$ or not $A$" for undecidable $A$
Nov 19, 2016
question
11
When is $\mathbb{L}$-rank definable in inner models of $\mathbb{V} = \mathbb{L}$?
Jan 25, 2013
question
10
limits of stable theories
Jul 18, 2017
answer
9
Which reals are "hyperarithmetic modulo ordinals"?
Aug 29, 2016
question
8
Consistency Strength of "HC is elementary in V[G]"
Nov 4, 2015
answer
8
Elementary extensions of direct product
Feb 11, 2017
answer
8
Examples of set theory problems which are solved using methods outside of logic
Aug 25, 2018
answer
8
A new cardinal characteristic of the continuum?
Aug 31, 2018
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13
The "zig-zag comb" weakly deformation retracts to the central zig-zag line