2 problems

Let $\phi$ be Euler's totient function. For $x\geqslant 1$, let $V(x)$ be the number of totients at most $x$, and for an integer $k\geqslant 1$, let $V_k(x)$ be the number of totie…

Joint fiber conjecture. For every $k\geqslant 1$ and $l\geqslant 2$, there are integers $n$ such that