The proof resolves a nearly 80-year-old problem known as the Duffin-Schaeffer conjecture. In doing so, it provides a final answer to a question that has preoccupied mathematicians since ancient times: ...

If you want to ditch your home service but keep your number, you can park it at Google for a one-time fee. Rick Broida is the author of numerous books and thousands of reviews, features and blog posts ...