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比利时vs摩洛哥足彩 ,
university of california san diego

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math 209 - number theory

karol koziol

university of toronto

some calculations with higher pro-p-iwahori cohomology

abstract:

let $g$ denote a $p-adic$ reductive group, and $i_1$ a $pro-p-iwahori$ subgroup. a classical result of borel and bernstein shows that the category of complex $g$-representations generated by their $i_1$-invariant vectors is equivalent to the category of modules over the (pro-p-)iwahori-hecke algebra $h$. this makes the algebra h an extremely useful tool in the study of complex representations of $g$, and thus in the local langlands program. when the field of complex numbers is replaced by a field of characteristic $p$, the equivalence above no longer holds. however, schneider has shown that one can recover an equivalence if one passes to derived categories, and upgrades $h$ to a certain differential graded hecke algebra. we will attempt to understand this equivalence by examining the $h$-module structure of certain higher $i_1$-cohomology spaces, with coefficients in mod-$p$ representations of $g$. if time permits, we'll discuss how these results are compatible with serre weight conjectures of herzig and gee--herzig--savitt.

host: claus sorensen

april 6, 2018

2:00 pm

ap&m 7218

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