Timeline for Questions about SGA 4
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Feb 8, 2022 at 21:51 | comment | added | Ingo Blechschmidt | @ZhenLin You are right; nowadays we do have a syntactic description of the fppf topos (Section 21.2 of these notes of mine, but Wraith's conjecture, which would yield a much nicer description, is still open. | |
| Feb 8, 2022 at 15:23 | comment | added | user1022117 | This answer is really, really helpful, thank you so much! In the meantime I stumbled across Artin's notes Grothendieck topologies, which seems to be an English reference for the material in IX. | |
| Feb 8, 2022 at 15:19 | vote | accept | user1022117 | ||
| Feb 7, 2022 at 22:57 | comment | added | Zhen Lin | Actually, Wraith already gave in [1979, Generic Galois theory of local rings] a conjectural description of fppf-local rings. I vaguely remember seeing the Gabber–Kelly paper and thinking at the time that it still falls short of proving Wraith's conjecture because it only works for integral domains. | |
| Feb 7, 2022 at 21:39 | history | edited | R. van Dobben de Bruyn | CC BY-SA 4.0 |
Clarified what I meant about chapter IX
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| Feb 7, 2022 at 21:31 | history | answered | R. van Dobben de Bruyn | CC BY-SA 4.0 |