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

4 votes

Zhang's generalization of Gross-Zagier formula

Could you explain me what are concretely the formulas in those cases? These formulas are equalities, so their content is that the left-hand side is equal to the right-hand; a tautology for sure, …
Olivier's user avatar
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2 votes
Accepted

Ordinary representations associated to modularforms: Étale submodules versus étale quotients

The usual normalizations for Galois representation attached to an eigencusp form $f$ is either to take the étale cohomology or the usual Tate module of the abelian variety cut out in the Jacobian of t …
Olivier's user avatar
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12 votes

Axiomatizing Gross-Zagier formulae

UPDATE: I have updated this answer slightly to take into account Victor's remark. I think that the precise questions being asked admit a straightforward answer. At the moment, no such formula is know …
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12 votes
Accepted

What's the difference between Euler systems and Kolyvagin systems?

Euler systems and Kolyvagin systems are closely related but quite different beasts nevertheless. According to their respective definitions, Euler systems are systems of classes $\{c(n)\in H^1(G_{\mat …
Olivier's user avatar
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4 votes

Do "most" modular forms have no extra twists?

This could be hard (though I admit all analytic number theory questions look hard to me). Indeed, we know quite a lot about the endomorphism algebra $X$ (built from cocycles attached to extra twists) …
Olivier's user avatar
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1 vote

Canonical models of Shimura varieties for GL2

This was getting too long for a comment I'll post it as an answer. Though the set of $K$-special points on the canonical model does not depend on the choice of an embedding of $K\hookrightarrow\opera …
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5 votes

Topics for an Undergraduate Expository Paper in Number Theory

Just on top of my head, I can think of the following themes, all having in common that they can be approached with a minimal knowledge and that there exists a continuous path from them to current rese …
6 votes

The current status of the Birch & Swinnerton-Dyer Conjecture

There is an article of J.Parson and B.Gross (On the local divisibility of Heegner points) from which I think some very very special instance of r=2, d=2 can be deduced. The argument is a combination o …
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5 votes
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non-commutative iwasawa theory

First a short answer. I don't think one can say that the commutative analytic side is known, as you do. It is fully known only in the cyclotomic $\mathbb{Z}_{p}$ situation, assuming the ETNC and in th …
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9 votes
Accepted

A question about Iwasawa Theory

There is a very close analogy but to unravel it requires some work. So take $X$ a smooth curve over $\mathbb F_{\ell}$ (more generally you could take $X$ a scheme over $\mathbb F_{\ell}$) and let $\m …
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8 votes
Accepted

BSD for modular forms

My comments are getting too long, so here is a tentative answer. First, a general statement: conjectures predicting special values of $L$-functions are formulated for all motives over number fields. …
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2 votes
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Do Tamagawa numbers of Galois representations stabilise in the cyclotomic tower?

As stated, the answer to your question is certainly no. For instance, an elliptic curve $E/\mathbb Q$ with split multiplicative ordinary reduction at $p$ will have unbounded Tamagawa number at $p$ i …
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11 votes

Is there a proof of quadratic reciprocity using $p$-adic numbers?

The quadratic reciprocity law is a special case of the product formula for Hilbert's symbol: for all $(a,b)\in\mathbb{Q}^{\times}$ \begin{equation} \underset{v}{\prod}(a,b)_{v}=1 \end{equation} where …
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5 votes
Accepted

Irreducibility of residual Galois representations attached to an elliptic curve

As Will Sawin points out, the following is mostly an answer to the question "Is it true that the set of primes such that $\rho_p$ is reducible is finite?" which is related but strictly stronger than t …
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9 votes

what is an Euler system and the motivation for it?

A small correction to Hunter Brooks's answer: Kato's Euler system is unrelated to Heegner points but comes from Beilinson's elements on modular curves. The fact that Heegner points form an Euler syste …
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