some guy on the street
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4 answers
18 votes
2k views
12 bookmarks
Irreducible polynomials with constrained coefficients
4 answers
12 votes
1k views
5 bookmarks
The most general context of Mather's Cube Theorems
0 answers
12 votes
747 views
2 bookmarks
What's so difficult about $\pi_{15}(SO)$?
2 answers
10 votes
258 views
Discrete disjoint covering of integer lattices
1 answers
7 votes
365 views
Status of the Isomorphism problem for automatic groups?
1 answers
6 votes
456 views
A curious construction of a chain complex and its homology
0 answers
4 votes
291 views
2 bookmarks
Connecting group ring, abelianization
1 answers
4 votes
234 views
4 bookmarks
Topological Localization of (the simply-connected cover of) SO or Spin
1 answers
4 votes
834 views
1 bookmarks
Contractability of Exotic R^4s
2 answers
4 votes
738 views
About higher Ext in R-Mod
3 answers
3 votes
986 views
3 bookmarks
Limits are terminal objects in another category; (when) are they colimits of (another diagram)?