Timeline for Class field theory and the class group
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S Feb 19, 2019 at 14:00 | history | bounty ended | CommunityBot | ||
| S Feb 19, 2019 at 14:00 | history | notice removed | CommunityBot | ||
| Feb 19, 2019 at 8:30 | history | edited | Daniel Loughran | CC BY-SA 4.0 |
added 2 characters in body
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| Feb 14, 2019 at 14:48 | history | edited | Daniel Loughran | CC BY-SA 4.0 |
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| S Feb 11, 2019 at 12:33 | history | bounty started | Daniel Loughran | ||
| S Feb 11, 2019 at 12:33 | history | notice added | Daniel Loughran | Authoritative reference needed | |
| Feb 11, 2019 at 6:04 | comment | added | Franz Lemmermeyer | The integer $N$ uniquely determines the field $k$ of $N$-th roots of unity, still it does not know its class group in any reasonable way. | |
| Feb 10, 2019 at 23:27 | comment | added | reuns | From $U$ you know some $N$ such that $V_N\subset U$ where $ V_N=\prod_{p^k\| N} (1+p^k\mathbb{Z}_p)\prod_{p\nmid N} \mathbb{Z}_p^\times $ then $k = \mathbb{Q}(\zeta_N)^H$ where $H = (U\cap \hat{\mathbb{Z}}^\times)/V_N,Gal(\mathbb{Q}(\zeta_N)/\mathbb{Q}) = \hat{\mathbb{Z}}^\times/V_N$ | |
| Feb 10, 2019 at 19:40 | history | edited | Daniel Loughran | CC BY-SA 4.0 |
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| Feb 7, 2019 at 10:30 | history | asked | Daniel Loughran | CC BY-SA 4.0 |