Euler-product nonvanishing of the Riemann zeta function
= Euler-product nonvanishing of the Riemann zeta function
{c}
Absolute convergence of the <Euler product> gives $\zeta(s)\ne0$ for $\Re s>1$. Equivalently,
$$
\frac1{\zeta(s)}=\sum_{n\geq1}\frac{\mu(n)}{n^s}
$$
converges absolutely there.