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Eric Wofsey's user avatar
Eric Wofsey's user avatar
Eric Wofsey
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answer
75
What are some reasonable-sounding statements that are independent of ZFC?
Oct 22, 2009
answer
67
Can anyone give me a good example of two interestingly different ordinary cohomology theories?
Oct 21, 2009
answer
60
understanding Steenrod squares
Oct 13, 2009
answer
58
Cohomology and fundamental classes
Oct 20, 2009
answer
44
Is every functor a composition of adjoint functors?
Oct 12, 2009
question
43
How can you tell if a space is homotopy equivalent to a manifold?
Oct 6, 2009
answer
43
Why does non-abelian group cohomology exist?
Oct 24, 2009
answer
40
Is there a "simplification" functor in algebraic topology?
Jan 8, 2015
answer
39
What is a continuous path?
Nov 12, 2011
answer
39
Whitehead for maps
Oct 26, 2009
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Why does mathoverflow encourage only research level questions while stackoverflow encourages ANY questions?
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Help cleanup tags!
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Simplicial Complex vs Delta Complex vs CW Complex
140
Why did no student correctly find a pair of $2\times 2$ matrices with the same determinant and trace that are not similar?
137
If polynomials are almost surjective over a field, is the field algebraically closed?
111
Is there any conjecture that we know is provable/disprovable but we haven't found a proof of yet?
86
How to represent "not an empty set"?