Linked Questions
24 questions linked to/from Two Representations of the Prime Counting Function
18
votes
4answers
1k views
$\# \{\text{primes}\ 4n+3 \le x\}$ in terms of $\text{Li}(x)$ and roots of Dirichlet $L$-functions
In a paper about Prime Number Races, I found the following (page 14 and 19):
This formula, while
widely believed to be correct, has not yet been proved.
$$
\frac{\int\limits_2^x{\frac{dt}{\ln t}...
8
votes
2answers
661 views
Prime-counting function: Evaluation
According to Riemann (I think) the (exact) prime counting function is given by:
$$
\pi(x) = \operatorname{R}(x^1) - \sum_{\rho}\operatorname{R}(x^{\rho}) \tag{1}
$$
with $ \operatorname{R}(z) = \...
8
votes
2answers
627 views
Tying some pieces regarding the Zeta Function and the Prime Number Theorem together
I came across two remarks that I would appreciate help in making the connections.
I) In Riemann's Explicit Formula: for $x > 1$
$\Pi = Li(x) - \sum_{\rho:\zeta(\rho)=0}Li (x^{\rho})- \log(2) +$ ...
3
votes
2answers
1k views
What is the distribution of primes modulo $n$?
Let $n\geq 2$ and let $k$ be "considerably larger" than $n$ (like some large multiple of $n$). Then for each $i$ such that $0<i<n$ and $\gcd(i,n)=1$ let's define
$$c_i=\left|\{p_j\;|\; p_j\equiv ...
10
votes
1answer
581 views
If these two expressions for calculating the prime counting function are equal, why doesn't this work?
So I've seen some different explanations of how the zeros of the zeta function can predict the prime counting function. The common example is that
$$\pi(x)=\sum_{n=1}^\infty \frac{\mu(n)}{n}J(x^{1/...
7
votes
2answers
1k views
Summing over General Functions of Primes and an Application to Prime $\zeta$ Function
Along the lines of thought given here, is it in general possible to substitute a summation over a function $f$ of primes like the following:
$$
\sum_{p\le x}f(p)=\int_2^x f(t) d(\pi(t))\tag{1}
$$
and ...
7
votes
2answers
373 views
Is there a complex variant of Möbius' function?
When you're dealing with arithmetic functions, you might have come across the classical Möbius' function
$$
\mu(n)=\begin{cases} (-1)^{\omega(n)}=(-1)^{\Omega(n)} &\mbox{if }\; \omega(n) = \Omega(...
13
votes
0answers
696 views
An Expression for $\log\zeta(ns)$ derived from the Limit of the truncated Prime $\zeta$ Function
I think, here, I found
$$
P_\color{red}x(\color{blue}s)=\sum_{p<\color{red}x} \frac{1}{p^{\color{blue}s}} =\sum_{\color{green}n=1}^{\infty}\frac{ \mu (\color{green}n)}{\color{green}n}
\sum_{z\in\{...
4
votes
1answer
177 views
How does it follow $s\int_1^{\infty}\frac{\psi(x)}{x^{s+1}}dx$?
I have two relations:
1)$-\frac{\zeta'(s)}{\zeta(s)}=\sum_{1}^{\infty}\frac{\Lambda(n)}{n^s}$.
2)$\psi(x)=\sum_{n\leq x}\Lambda(n)$.
From these two how does it follow that $-\frac{\zeta'(s)}{\zeta(...
7
votes
1answer
267 views
The use of log in the Mean density of the nontrivial zeros of the Riemann zeta function (part 2)
As part of my MSc I am reviewing a paper. The paper is a review on the statistical distribution of the unfolded zeros (see below) of the Reimann functional equation. In the paper there is a sentence:
...
5
votes
1answer
256 views
Squeezing $\pi(x)$ out of $\psi(x)$
Can $\pi(x)$ be written in terms of $\psi(x)$? I can only seem to approximate it:
$$
\pi(x)\approx\sum_{n=1}^{\infty}\left[\dfrac{\mu(n)}{n}\left(\dfrac{1}{\log(x^{1/n})}\left(\psi(x^{1/n})-x^{1/n}+\...
3
votes
1answer
428 views
Is $\frac1\pi \arctan \frac\pi{\ln x}- \frac1{\ln x}$ related to the trivial solutions $\zeta(-2n)$?
The Prime Counting Function $\pi(x)$ is given
$$
\pi(x) = \operatorname{R}(x^1) - \sum_{\rho}\operatorname{R}(x^{\rho}) - \frac1{\ln x} + \frac1\pi \arctan \frac\pi{\ln x} ,
$$
with $ \...
2
votes
1answer
115 views
What does $L(n,\chi_4)$ mean?
I was reading some articles related to Euler sums and the Riemann zeta function, when I came across this definition:
$$
L(n,\chi_4) = \sum_{k=0}^{\infty}\frac{(-1)^k}{(2k+1)^n}
$$
What is this ...
11
votes
0answers
645 views
More elegant $\zeta(s)$ zeros counting function than $N(T)$
The explicit formula expresses the deep connection between the primes $p$ and the non-trivial zeros $\rho$ of $\zeta(s)$. The prime-counting function is given by the following formula giving primes in ...
2
votes
2answers
214 views
State of art of prime numbers distribution [closed]
I was reading some questions about prime numbers posted in latest days and a question came to my mind:
What is the state of art of the research into prime numbers distribution?
I read then several ...