Timeline for Is there a version of algebraic de Rham cohomology that can be used to calculate torsion classes?
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| Mar 30, 2020 at 3:31 | vote | accept | user1092847 | ||
| Jan 11, 2020 at 22:06 | answer | added | dorebell | timeline score: 9 | |
| Jan 10, 2020 at 18:05 | comment | added | user1092847 | @MarcHoyois Thanks, now I see that what I was objecting to really is the failure of $\mathbb A^1$ invariance. | |
| Jan 10, 2020 at 7:51 | comment | added | Marc Hoyois | This claim about crystalline cohomology is only for smooth proper varieties. Berthelot's rigid cohomolgy extends crystalline cohomology to more general varieties, and it is $\mathbb A^1$-invariant, but it has rational coefficients. A reasonable $\mathbb A^1$-invariant theory with mod $p$ coefficients for $\mathbb F_p$-varieties is logarithmic de Rham cohomology (= motivic cohomology). | |
| Jan 9, 2020 at 23:02 | answer | added | SashaP | timeline score: 9 | |
| Jan 9, 2020 at 18:45 | history | edited | YCor | CC BY-SA 4.0 |
fixed spelling of de Rham
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| Jan 9, 2020 at 17:56 | history | edited | user1092847 | CC BY-SA 4.0 |
added 6 characters in body; edited tags
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| Jan 9, 2020 at 17:39 | history | asked | user1092847 | CC BY-SA 4.0 |