Timeline for why is $\cap \mu_B:H^k(\mathbb{R}^n,\mathbb{R}^n\setminus B;R)\to H_{n-k}(\mathbb{R}^n;R)$ an isomorphism? [closed]
Current License: CC BY-SA 3.0
7 events
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| Apr 13, 2017 at 12:19 | history | edited | CommunityBot |
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| Mar 13, 2016 at 18:14 | comment | added | K.J. Moi | If $n=k$ both source and target are free $R$-modules of rank $1$ and you have a surjective $R$-module map between them. | |
| Mar 13, 2016 at 17:58 | history | closed |
Alex Degtyarev Stefan Kohl♦ Mikhail Katz Wolfgang Chris Gerig |
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| Mar 13, 2016 at 9:53 | review | Close votes | |||
| Mar 13, 2016 at 18:03 | |||||
| Mar 13, 2016 at 9:35 | comment | added | Alex Degtyarev | In the learned terms, $\mathbb{Z}$ is a Hopfian group. | |
| Mar 13, 2016 at 9:08 | review | First posts | |||
| Mar 13, 2016 at 9:14 | |||||
| Mar 13, 2016 at 9:03 | history | asked | alg | CC BY-SA 3.0 |