What happened when a gambler asked for help from a mathematician? The formal study of Probability. Infinite Series is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV ...

So you’ve been set a task: prove something which is clearly not true. That sounds much tougher than it is. All you need is basic math skills, an infinite series of numbers, and a playful spirit. Take ...

GEOMETERS are wont to speak (it seems to me) somewhat laxly of “the line at infinity” as if there were only one such line in a plane; in a certain but not in the most obvious sense this is true—viz.