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user 8032
This tag is to be used only when re-tagging highly(!) off-topic questions where none of the actual tags would make sense; all actual tags the questioner has used are removed and something is needed to have some tag, which is enforced by the software, so this tag is used. However note that this tag is also used in the process of moderators deleting tags. Thus a question having this tag does most of the time not mean that somebody found it off-topic.
12
votes
Accepted
Definition of Pontrjagin Classes
The odd Chern classes of the complexified bundle are of order 2 and are determined by the Stiefel-Whitney classes of the original real bundle $\xi$ by the formula
$$
c_{2k+1}(\xi\otimes \Bbb C) = \bet …
- 18.5k
5
votes
Construction of Serre Spectral Sequence
I wanted to post the following as a comment, but it's too long.
It might help to realize where the differential comes from. Let $p: E \to B$ be a Hurewicz fibration. Assume $B$ is a connected CW com …
- 18.5k
1
vote
Accepted
Examples of H-cogroups and a question about julia sets
Regarding question (1), the answer is that there are co-groups which aren't suspensions.
Berstein, Israel; Harper, John R.
Cogroups which are not suspensions. Algebraic topology (Arcata, CA, 1986), 6 …
- 18.5k