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Prime numbers, diophantine equations, diophantine approximations, analytic or algebraic number theory, arithmetic geometry, Galois theory, transcendental number theory, continued fractions

5 votes
1 answer
606 views

Hodge-Tate decomposition for formal groups

Hi All, Where can I find a proof of the Hodge-Tate decomposition for Lubin-Tate formal groups? Thanks!
unknown's user avatar
  • 647
7 votes
1 answer
443 views

strong approximation and one-dimensional automorphic representations

Hi, Let $D$ be a quaternion algebra over $\mathbf Q$ such that $D\otimes\mathbf R = M_2(\mathbf R)$. Let $\pi = \pi_\infty \otimes_p \pi_p$ be an irreducible automorphic representation of $D^\times$ …
unknown's user avatar
  • 647
4 votes
0 answers
1k views

level structures and moduli of abelian varieties

Hello, In the definition of level structure of level $n$ for an elliptic curve $A$, there are two versions: an isomorphism of group schemes $(\mathbf Z/n\mathbf Z)^2 \to A[n]$. an isomorhpism of gr …
unknown's user avatar
  • 647
8 votes
1 answer
992 views

Is the Galois x Hecke action on cohomology of Shimura varieties semi-simple?

Given a reductive group $G/\mathbf Q$ (+ additional data), and a compact open subgroup $K\subset G(\mathbf A^\infty)$, there is a standard construction that produces a Shimura variety $S$ and if we ch …
unknown's user avatar
  • 647
5 votes
0 answers
832 views

Motivic Galois group and Shimura varieties

Hi, Suppose that one has a Shimura variety $Sh(G,X)$ where $(G,X)$ is the corresponding Shimura datum and suppose that it can be interpreted as a moduli space of motives (e.g. PEL type Shimura variet …
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  • 647