Could there be an elementary function $f(x)$ such that
$$ \pi(x) = f(x) $$
where $\pi(x)$ represents the number of the prime numbers up to $x$? (By elementary I mean, functions those are differantiable)
Could there be an elementary function $f(x)$ such that
$$ \pi(x) = f(x) $$
where $\pi(x)$ represents the number of the prime numbers up to $x$? (By elementary I mean, functions those are differantiable)
By definition, $\pi$ is not differentiable at any point $x \in \mathcal{P}$ the set of prime numbers. So it is not possible to find such a $f$.