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The Riemann zeta function is the function of one complex variable $s$ defined by the series $\zeta(s) = \sum_{n \geq 1} \frac{1}{n^s}$ when $\operatorname{Re}(s)>1$. It admits a meromorphic continuation to $\mathbb{C}$ with only a simple pole at $1$. This function satisfies a functional equation relating the values at $s$ and $1-s$. This is the most simple example of an $L$-function and a central object of number theory.

0 votes
2 answers
267 views

Is the number of real values of Zeta on the critical line up to some ordinate known?

The famous plot of $\zeta(1/2+it)$ for real $t$ seems to show that this function gets a non zero real value exactly once between two consecutive Riemann zeros. Moreover, letting $\rho_{i}$ the $i$-th …
Sylvain JULIEN's user avatar
0 votes
2 answers
323 views

What is known about the set $S$ of couples of rationals $(q,q')$ such that $\zeta(q+iq')$ is...

The question is the title. For example, if we could show that $S$ is finite, then this would entail that every large enough integer $n$ is such that $\zeta(2n+1)$ is irrational and that, under RH, alm …
Sylvain JULIEN's user avatar
1 vote
0 answers
172 views

Do we know a lower bound for the number of critical zeros of the Riemann zeta-function with ...

If I'm not mistaken, the imaginary parts of the critical zeros of the Riemann Zeta function are conjectured to be linearly independent over $\mathbb{Q}$, but I think we're very far from proving such a …
Sylvain JULIEN's user avatar
3 votes

Can Voronin's universality theorem be used to show that $\sigma\circ\zeta=\zeta\circ\sigma$ ...

I apologize for answering my own question, but it has turned out that the statement I consider can actually be proved without using Voronin's theorem. Here comes an excerpt from an article of mine en …
Sylvain JULIEN's user avatar
0 votes
1 answer
265 views

Linear (in)dependence of $\Im(\rho_n)$ and fundamental theorem of arithmetic

Hello, If I'm not mistaken, globally speaking, Riemann's explicit formula establishes a duality between prime numbers and the non trivial zeroes of the Riemann zeta functions. The imaginary parts of …
Sylvain JULIEN's user avatar
4 votes
1 answer
461 views

Do we know an upper bound for the multiplicity of the non-trivial zeros of Zeta?

In Are the nontrivial zeros of the Riemann zeta simple?, I asked whether it was known that all non-trivial zeros of the Riemann Zeta function were simple or not. It appears that such a proof is missin …
Sylvain JULIEN's user avatar
6 votes
1 answer
278 views

Can Voronin's universality theorem be used to show that $\sigma\circ\zeta=\zeta\circ\sigma$ ...

Let $\sigma$ be a field automorphism of $\mathbb{C}$ that commutes with the Riemann Zeta function. Can we use Voronin's universality theorem to prove that $\sigma$ is necessarily continuous? Thanks in …
Sylvain JULIEN's user avatar
1 vote
1 answer
243 views

Do we know an upper bound for the number of possible real parts of the non trivial zeroes of...

Let $n_{\zeta}$ denote the number of possible real parts for the non trivial zeroes of the Riemann Zeta function. RH is equivalent to $n_{\zeta}=1$, and the symmetry arising from the functional equati …
Sylvain JULIEN's user avatar
4 votes

Are the nontrivial zeros of the Riemann zeta simple?

I finally managed to find back the article I was talking about. Just click on the green link in the first message of the following link: link text
Sylvain JULIEN's user avatar
2 votes
0 answers
135 views

What is the best known upper bound for $( \gamma_{n+1}-\gamma_{n})\max_{\{T\in(\gamma_{n},\g...

For $ n $ a positive integer, denote by $ L(n) : =\gamma_{n+1}-\gamma_{n} $ with $ \gamma_{n} $ the imaginary part of the $ n $-th critical zero of the Riemann zeta function and by $ M(n) : =\max …
Sylvain JULIEN's user avatar
1 vote
0 answers
150 views

Do we believe that the distribution of spacings of successive critical zeros of zeta is log-...

Let $\gamma^{+}(T)$ be the imaginary part of the critical zero of $\zeta$ closest to $1/2+iT$ with $\gamma^{+}(T)\ge T$ and define similarly $\gamma^{-}(T)$ with a reversed inequality. Let $g(T)$ be t …
Sylvain JULIEN's user avatar
19 votes
3 answers
6k views

Are the nontrivial zeros of the Riemann zeta simple?

A few years ago, I found on arXiv an article in which the authors (I think they were at least two to write it) claimed to have proven that the non trivial zeros of the Riemann zeta function were all s …
Sylvain JULIEN's user avatar
2 votes

On the real part of the Riemann zeta function inside the critical strip

See https://www.researchgate.net/publication/321187136_Pair_Correlation_of_Zeros_of_the_Real_and_Imaginary_Parts_of_the_Riemann_Zeta-Function where the authors investigate the behavior of the real an …
Sylvain JULIEN's user avatar
-4 votes

Functional equation and/or growth estimates for a shifted L function

This preprint by Kaczorowski and Perelli may contain the pieces of information you're looking for: https://arxiv.org/abs/1911.10497
Sylvain JULIEN's user avatar
3 votes
1 answer
727 views

what would be the consequences on the distribution of primes of $\Lambda=\infty$?

It is widely believed that the quantity $\Lambda:=\lim\sup\dfrac{t_{n+1}-t_{n}}{2\pi/\log t_{n}}$, where $t_{n}$ is the imaginary part of the $n$-th non-trivial zero on the critical line of the Rieman …
Sylvain JULIEN's user avatar

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