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Top Questions
9
votes
How to tell if an element of a quotient ring is a zero divisor
abstract-algebra
algebraic-geometry
commutative-algebra
asked Apr 25 '12 at 16:05
math.stackexchange.com
5
votes
Possible cup product structures on a manifold
algebraic-topology
asked Jul 10 '12 at 17:46
math.stackexchange.com
5
votes
Why is there no foliations of the 2-sphere, or a genus two surface?
differential-topology
asked Aug 8 '12 at 22:33
math.stackexchange.com
Top Answers
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