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Ashutosh's user avatar
Ashutosh's user avatar
Ashutosh
  • Member for 13 years, 5 months
  • Last seen more than 1 year ago
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All Questions Answers
Score Newest
answer
168
Does every non-empty set admit a group structure (in ZF)?
Jan 26, 2010
answer
37
If any open set is a countable union of balls, does it imply separability?
Sep 19, 2014
question
26
Definable collections without definable members (in ZF)
Jan 1, 2010
question
21
A question about small sets of reals
Apr 15, 2014
question
21
A question about sigma algebras and rectangles
Jan 5, 2017
answer
19
How quickly can the derivative of an everywhere differentiable function change sign?
Apr 4, 2017
answer
17
Sierpinski's construction of a non-measurable set
Dec 22, 2014
question
16
On statements independent of ZFC + V=L
Jan 12, 2010
answer
16
Does there exist an uncountable partition of a Polish space so that the union of any collection of blocks is Borel?
Aug 18, 2015
question
16
A problem of Keisler and Tarski
Sep 18, 2015
Top network posts
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47
Is there a topology $T$ on the set of complex numbers such that the class of $T$-continuous functions and the class of analytic functions coincide?
28
Example where union of increasing sigma algebras is not a sigma algebra
15
Putnam 1990: Problem A-4
13
Subset of plane with measure $1$ in all lines
12
Outer measure is not finitely additive

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