Sato–Tate conjecture

《非線形問題と複素幾何学》 · 第 314 页 · Section 15.2「Additive Convolution of Multiplicative Functions」

Indeed, by the Sato–Tate conjecture one predicts that $\sum_{p\le x}|\lambda(p)|p^{-1}=c\log\log x+O(1)$.