Timeline for Links between tight closure and deformation theory
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Feb 25, 2017 at 2:23 | answer | added | Neil Epstein | timeline score: 1 | |
| Feb 24, 2017 at 16:09 | history | edited | Mohammad Golshani | CC BY-SA 3.0 |
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| Feb 24, 2017 at 16:06 | comment | added | Mohammad Golshani | Please add your answer, any helps are appreciated. | |
| Feb 23, 2017 at 22:15 | answer | added | lemiller | timeline score: 3 | |
| Feb 23, 2017 at 16:49 | comment | added | Neil Epstein | There are many papers in the tight closure literature about which F-singularities 'deform': let P be a singularity property. We say that P "deforms" if whenever you have a nice enough local ring R and R-regular element $t\in R$, if $R/tR$ satisfies P then $R$ satisfies $P$. For instance, normality deforms (classically), F-regularity does not in general (cf. Singh) but it does in the Gorenstein case (aberbach et al). F-purity doesn't (Fedder), F-injectivity deforms under some conditions on local cohomology (Horiuchi-Miller-Shimomoto). Not sure about f-rationality. Shall I post as an answer? | |
| Feb 23, 2017 at 11:14 | history | asked | Mohammad Golshani | CC BY-SA 3.0 |