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Tagged with modular-group arithmetic-geometry
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GL2 action on torsion sections of elliptic curves
I am reading Kato's $p$-adic Hodge theory paper and I am confused about a rather embarrassing and admittedly very minor thing, but it is nevertheless important.
In Section 1.6 of Kato, it is claimed ...
- 751
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Meaning of this Eisenstein series notation from Gross–Zagier paper [duplicate]
In equation (2.14) of their paper [1], Gross–Zagier define the following Eisenstein series
\begin{align}
E_N(z, s) = \sum_{\gamma \in \bigg(\begin{matrix} \ast & \ast \\ 0 & \ast \end{matrix}\...
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