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On the blending of real/complex analysis with number theory. The study involves distribution of prime numbers and other problems and helps giving asymptotic estimates to these.

16 votes
Accepted

How to compute with the Stark conjectures?

The main reference here is the very useful User's Guide, C. Batut, K. Belabas, D. Bernardi, H. Cohen, M. Olivier, "User's Guide to PARI / GP" (2003) Particularly the sections about bnrstark (pp. 1 …
Myshkin's user avatar
  • 17.6k
14 votes
Accepted

Two Vinogradovs? Is one the son of the other?

The answer seems to be no. It is hard to find direct confirmation, but every time their names are mentioned together it is made clear that there's no relationship. The Russian mathematician Askold …
Myshkin's user avatar
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13 votes
2 answers
722 views

Special values of $\zeta$ outside the real line and the critical strip

The values of Riemann's function at the integers have been extensively studied. I was wondering, is there anything interesting known (or conjectured) to happen arithmetically outside the real line (an …
Myshkin's user avatar
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13 votes
0 answers
620 views

No Siegel-Landau zeros for $\mathrm{GL}(n)$

The problem of non-existance of Siegel-Landau zeros seems to be uncharacteristically easier for cuspidal automorphic representations $\pi$ on $\mathrm{GL}(n)$ if $n\geq2$. We have in fact: There a …
Myshkin's user avatar
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11 votes
1 answer
1k views

Upper bounds for regulators of real quadratic fields

We have an elementary sharp lower bound for the regulator of a real quadratic field as a function of the discriminant $$R\geq \tfrac{1}{2}(\sqrt{d-4}+\sqrt{d})$$ It is sharp because the equality hol …
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9 votes
Accepted

The connection between the Weil conjectures and Ramanujan's conjecture

Basically, the coefficients of an holomorphic cusp form are related to the number of points on a certain smooth projective variety over $\mathbb{F}_p$, and the Weil-Riemann hypothesis gives the necces …
Myshkin's user avatar
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9 votes
Accepted

Upper bound for the first Hardy-Littlewood conjecture

This is explained for example in Iwaniec & Kowalski's "Analytic Number Theory", as an standard application of Selberg's $\Lambda^2$ sieve. See chapter 6, Elementary sieve methods. In particular you ge …
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8 votes
Accepted

Is $\liminf \frac{\sigma_{k}(n)}{n}$ finite for every $k$?

It is an open problem, only known for $k=1,2$. Both the conjecture and the known cases are due to Schinzel. You can find a nice survey here: "On the third iterates of the φ- and σ-functions" H. Maie …
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8 votes
Accepted

Artin conjecture on L-functions

This is the status as far as I know. For dimension $\leq 2$ it is up to date. For higher dimensional representations I'm sure it is very incomplete, so feel free to edit or comment. Dimension 1. Known …
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8 votes
Accepted

Fourier expansion of automorphic forms

I don't see the relation between the first sentence and the question, so perhaps I'm missing something, but the answer to the question is yes, regardless. Fourier expansion is a very important tool i …
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7 votes
Accepted

Locating a certain result on primes represented by a certain polynomial

They prove it in section 14 ("An Application") of their paper John Friedlander & Henryk Iwaniec, "The Illusory Sieve" (2005) As pointed out by Lucia in the comments, the result is conditional on t …
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7 votes

Legendre's Constant

I'll stay clear from the infamous $B_L'$ notation. Legendre's original (correct) statement is that $$\pi(x)=\frac{Bx}{\log x-A+o(1)}$$ where the so-called "Legendre's constant" is $A$. The incorre …
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7 votes

Logarithmic integral, $π(x)$ and $x/(\ln x)$

No explicit values are known. For a recent reference, see "A still sharper region where $π(x) − \text{li}(x)$ is positive", by Y. Saouter, T.S. Trudgian and P. Demichel (2014). An extract from the la …
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6 votes
Accepted

Weil Conjectures Analog for Multivariate Zeta Functions

The Weil conjectures have to do with local zeta-function over finite fields. The Riemann zeta function and the multiple zeta functions are defined over $\mathbb{Q}$ So Weil conjectures are simply th …
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6 votes

How to understand the explicit formula for zeta function?

The analogy between zeta functions and trace formulas goes at least to Selberg, when he proved his famous trace formula for hyperbolic surfaces and the result turned out to resemble Weil's generalizat …
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