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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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …