Timeline for Functoriality properties of the perverse $t$-structure for torsion (constructible complexes of) sheaves
Current License: CC BY-SA 3.0
4 events
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| May 8, 2012 at 22:31 | comment | added | Alex | Yes, when I wrote my answer I had not realized that $\mathbb{Z}/\ell^m\mathbb{Z}$ coefficients work just like $\mathbb{Z}/\ell\mathbb{Z}$ for many things. There is a self-dual t-structure, BBD 4.1 is still fine I think, though you have to be careful if you want to take tensor products. | |
| May 7, 2012 at 20:05 | comment | added | Mikhail Bondarko | Do you think that the situation changes when one replaces $Z/lZ$-derived categories with (say) $Z/l^2Z$-ones? It seems that the 'canonical' $t$-structure for $Z/l^2Z$-modules is self-dual, so that there should exist a self-dual $t$ also. Something like this is said in \S4.0 of BBD; yet I am not sure that I understood this French text correctly. | |
| Sep 23, 2011 at 19:47 | vote | accept | Mikhail Bondarko | ||
| Sep 23, 2011 at 15:55 | history | answered | Alex | CC BY-SA 3.0 |