I am trying to learn a little bit about crystalline cohomology (I am interested in applications to ordinariness). Whenever I try to read anything about it, I quickly encounter divided power structures, period rings and the de Rham-Witt complex. Before looking into these things, it would be nice to have an idea of what the cohomology that you construct at the end looks like.
The l-adic cohomology of abelian varieties has a simple description in terms of the Tate module. My question is: is there something similar for crystalline cohomology of abelian varieties?
More precisely, let X be an abelian scheme over mathbbZp. Is there a concrete description of H1(X0/mathbbZp)? (or just H1(X0/mathbbZp)otimesmathbbZpmathbbQp?) I think that this should consist of three things: a mathbbZp-module M, a filtration on MotimesmathbbZpmathbbQp (which in the case of an abelian variety has only one term which is neither 0 nor everything) and a Frobenius-linear morphism MtoM.
I believe that the answer has something to do with Dieudonné modules, but I don't know what they are either.
No comments:
Post a Comment