A note on the Duffin Schaeffer conjecture
Given a sequence of real numbers \psi(n)}_{n\in\mathbb{N} with $0\leq \psi(n) 0$ such that \sum_{n\in\mathbb{N}\psi(n){1+\epsilon}\cdot\frac{\varphi(n){n}\infty, then the Lebesgue measure of $W(\psi) equals 1.