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Results tagged with etale-cohomology
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user 4231
for questions about etale cohomology of schemes, including foundational material and applications.
14
votes
how to find the varieties whose cohomology realizes certain representations?
This is an extended comment, certainly not an answer to the very broad and perhaps unanswerable multiple part question being asked here ("How did people find those varieties?"). A facetious response …
- 52.9k
10
votes
Accepted
Is the Gelfand-Graev character isomorphic to a cohomology group for some sheaf on a Deligne-...
In the 35 years following the Deligne-Lusztig construction of generalized characters of finite groups of Lie type, a considerable amount of work by Lusztig and others has led to a reasonably detailed …
- 52.9k
26
votes
1
answer
2k
views
Example of non-projective variety with non-semisimple Frobenius action on etale cohomology?
This question was motivated by a more general question raised by Jan Weidner here. In general one starts with a variety $X$ (say smooth) over an algebraic closure of a finite field $\mathbb{F}_q$ of …
- 52.9k