Timeline for Sheaves with no cohomology
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Feb 18, 2014 at 15:41 | comment | added | Carl | @JimHumphreys: Thanks a lot for the nice references. | |
| Feb 18, 2014 at 13:55 | history | edited | David Benjamin Lim | CC BY-SA 3.0 |
added 110 characters in body
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| Feb 18, 2014 at 12:30 | comment | added | Jim Humphreys | For the transition to algebraic geometry (in characteristic 0), see Demazure: gdz.sub.uni-goettingen.de/dms/load/img/?PPN=GDZPPN002092379 | |
| Feb 18, 2014 at 9:28 | comment | added | Tobias Kildetoft | This example also carries over to algebraic groups (in any characteristic). A typical example of such a $\lambda$ is when there is a simple root $\alpha$ with $\langle\lambda,\alpha^{\vee}\rangle = -1$ (this is one of the reasons the "dot" action shows up so often, as that translates to having $-\rho$ as the new "$0$", and $-\rho$ behaves like a $0$ should when we look at the cohomology). | |
| Feb 17, 2014 at 15:19 | history | answered | David Benjamin Lim | CC BY-SA 3.0 |