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Top Questions
48
votes
Is Lebesgue's "universal covering" problem still open?
mg.metric-geometry
open-problem
asked Jul 10, 2010 at 18:31
mathoverflow.net
43
votes
A question about ordinal definable real numbers
set-theory
lo.logic
asked Mar 9, 2010 at 14:50
mathoverflow.net
31
votes
Is there a good argument for why you can't place 4 queens which cover a chessboard?
co.combinatorics
chess
asked Jul 2, 2010 at 18:13
mathoverflow.net
20
votes
How thinly connected can a closed subset of Hilbert space be?
gn.general-topology
asked May 18, 2010 at 20:05
mathoverflow.net
13
votes
Can the circle be characterized by the following property?
mg.metric-geometry
asked Apr 20, 2010 at 14:21
mathoverflow.net
11
votes
The status of 'the consistency of NF relative to ZF'
set-theory
asked May 28, 2013 at 14:23
mathoverflow.net
11
votes
A question about definable non-empty sets containing no definable elements.
set-theory
asked Feb 11, 2013 at 15:01
mathoverflow.net
11
votes
How much of general topology can be developed by taking the notion of "connected set" as the sole topological primitive
gn.general-topology
asked Jun 3, 2014 at 19:43
mathoverflow.net
10
votes
A question about tiling Hilbert Space
mg.metric-geometry
hilbert-spaces
tiling
asked Feb 8, 2014 at 19:38
mathoverflow.net
9
votes
A question about J.H. Conway's SURREAL NUMBERS
set-theory
surreal-numbers
asked Sep 29, 2011 at 20:17
mathoverflow.net
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