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

184 votes
Accepted

Philosophy behind Mochizuki's work on the ABC conjecture

I'll take a stab at answering this controversial question in a way that might satisfy the OP and benefit the mathematical community. I also want to give some opinions that contrast with or at least c …
53 votes
5 answers
4k views

Distribution of square roots mod 1

I was wondering about the distribution of $\sqrt{p}$ mod $1$ this morning, as one does while brushing one's teeth. I remembered the paper of Elkies and McMullen (Duke Math. J. 123 (2004), no. 1, 95–1 …
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35 votes
Accepted

Is there a "Basic Number Theory" for elliptic curves?

I don't think that such a survey paper or textbook exists, but the closest thing I know of is "A note on height pairings, Tamagawa numbers, and the Birch and Swinnerton-Dyer conjecture" by Spencer Blo …
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27 votes
Accepted

Does this sum equal zeta(3)?

Hi David, This is the first example of a multiple zeta identity. Your sum S is just $\zeta(1,2)$, where the multiple zeta value is defined by: $$\zeta(s_1, s_2, \ldots, s_k) = \sum_{0 < n_1 < n_2 < …
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  • 13.3k
27 votes

What is the "serious" name for the topograph (for a quadratic form)

There's no more serious name for the topograph, as far as I know. And Conway puts a lot of thought into his names, so I think it's best to keep it. I think it's meant to fit into a larger metaphoric …
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26 votes
0 answers
554 views

Elliptic analogue of primes of the form $x^2 + 1$

I have a project in mind for an undergraduate to investigate next quarter -- a curiosity really, but I'm surprised I can't find it in the literature. I do not want a detailed analysis here... but ple …
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  • 13.3k
20 votes

The square root of Wilson's theorem when $p\equiv 1 \mod 4$

In the case $p \equiv 1$ mod $4$, the connection is to the real quadratic field ${\mathbb Q}(\sqrt{p})$, whereas the case $p \equiv 3$ mod $4$ is connected to the imaginary quadratic field ${\mathbb Q …
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17 votes

Do L-functions exist for Half-integral weight modular forms?

Upon David Loeffler's request, here is a more fleshed out version of my former comments: In his comment, Nick Ramsey mentioned that the natural L-function for a half-integral weight modular form is re …
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14 votes
Accepted

Representation theory of reductive groups in characteristic $p$ as a limit of the theories i...

I think, although it's dated later than Deligne's paper that you mentioned, that the first written instance of Kazhdan's principle is in the paper "Representations of groups over close local fields", …
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14 votes
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Local Langlands for $GL(2,\mathbf{C})$ and reducible principal series

This is a common point of confusion, and the OP is on exactly the right track. A good reference for the representation theory is Chapter 1, Section 6, of Jacquet-Langlands book "Automorphic forms on …
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12 votes

What are the local Langlands conjectures nowadays, for connected reductive groups over a $p$...

First, I'd like to second the reference given by JT: David Vogan, "The local Langlands conjecture", appearing in Representation Theory of Groups and Algebras (J. Adams et al., eds. Contemporary Mathe …
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11 votes
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Is H^2(W_p,C^times) well-known?

It is known that $H^2(W, C^\times)$ is trivial, when $W$ is the Weil group of a global or local field, with the trivial action on $C^\times$, and the cohomology is taken in the sense of Moore (measura …
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11 votes
Accepted

Is there a canonical height on the Weil-Chatelet group?

In my opinion, instead of a "height" on the Weil-Chatelet group, one should consider a "depth", using the local duality between the points on an elliptic curve and the elements of the Weil-Chatelet gr …
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11 votes
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Langlands correspondence for higher local fields?

The Langlands correspondence for higher local fields is still at an early stage of development. I haven't really kept up with it, but here's some key points. As the question stated, and Loren commen …
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11 votes
1 answer
847 views

Can local duality for elliptic curves be proven with "big rings"?

From Exercise 5.14, Ch. V of Silverman's "Advanced Topics in the Arithmetic of Elliptic Curves", I learned that the local duality for elliptic curves over $p$-adic fields can be proven for Tate curves …
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