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Eric Wofsey's user avatar
Eric Wofsey's user avatar
Eric Wofsey
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74
What are some reasonable-sounding statements that are independent of ZFC?
Oct 22, 2009
66
Can anyone give me a good example of two interestingly different ordinary cohomology theories?
Oct 21, 2009
59
understanding Steenrod squares
Oct 13, 2009
57
Cohomology and fundamental classes
Oct 20, 2009
44
Is every functor a composition of adjoint functors?
Oct 12, 2009
42
How can you tell if a space is homotopy equivalent to a manifold?
Oct 6, 2009
42
Why does non-abelian group cohomology exist?
Oct 24, 2009
40
Is there a "simplification" functor in algebraic topology?
Jan 8, 2015
39
What is a continuous path?
Nov 12, 2011
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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163
Simplicial Complex vs Delta Complex vs CW Complex
138
Why did no student correctly find a pair of $2\times 2$ matrices with the same determinant and trace that are not similar?
135
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"?