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Algebraic number fields, Algebraic integers, Arithmetic Geometry, Elliptic Curves, Function fields, Local fields, Arithmetic groups, Automorphic forms, zeta functions, $L$-functions, Quadratic forms, Quaternion algebras, Homogenous forms, Class groups, Units, Galois theory, Group cohomology, Étale cohomology, Motives, Class field theory, Iwasawa theory, Modular curves, Shimura varieties, Jacobian varieties, Moduli spaces

5 votes

If Spec Z is like a Riemann surface, what's the analogue of integration along a contour?

For a number $f$ the local-global formula written as $$ f_2\cdot f_3\cdot \dotsb \cdot f_{\mathbb Q} = 1 $$ where $f_p$ is the inverse power of $p$ that is equal to $f$ in the local field of $p$-adi …
Ilya Nikokoshev's user avatar
7 votes
1 answer
554 views

Hasse principle for a group

$\DeclareMathOperator\PSL{PSL}$In the paper Ono - "Hasse principle" for $\PSL_2 (\mathbb Z)$ and $\PSL_2(\mathbb F)$ there's a definition of a Hasse principle for a group $G$, but I don't completely g …
Ilya Nikokoshev's user avatar
5 votes

"Understanding" $\mathrm{Gal}(\bar{\mathbb{Q}}/\mathbb{Q})$

I'm far from expect in this topic, but here's my attempt. First, and that's something quite straightforward, people want to study Gal Q (this is how I will denote it; this common shortcut is defined …
Ilya Nikokoshev's user avatar