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Answer a question more than 60 days later with score of 5 or more. This badge can be awarded multiple times.

earned this badge 8 times.
What would the slice-ribbon conjecture imply?
Awarded Aug 25 '11 at 10:50
Explanation for the Chern character
Awarded Aug 21 '11 at 10:05
Failure of smoothing theory for topological 4-manifolds
Awarded Jan 1 '11 at 4:50
slice-ribbon for links (surely it's wrong)
Awarded Jun 19 '10 at 12:05
A problem/conjecture related to 4-manifolds that deserves a name. What name does it deserve?
Awarded Mar 29 '10 at 1:05
Natural examples of finite dimensional spaces with interesting 2-type
Awarded Mar 22 '10 at 15:20
Is the following map from Z(G) x H^3(G, C*) --> H^2(G, C*) ever nontrivial?
Awarded Mar 18 '10 at 17:20
A question on classification of almost complex structures on $4$-manifolds
Awarded Mar 14 '10 at 11:50

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