found online by Raymond
From The Journal of Improbable Research :
If you’re earnestly chasing something that can’t tun as fast as you do, a cursory mathematical analysis of the situation can give a reassuring result – you’ll probably catch up with it. (Despite what the Ancient Greek philosopher Zeno might have said about it). But what if the entity being chased knows that it’s being chased – and takes unorthodox avoidance measures. Such as running straight towards you, or deliberately trying to lead you towards a trap of some kind? The math(s) becomes considerably more complex.
Professor Andrew Gard of the mathematics and computer science department at Lake Forest College, Illinois, US, has extensively explored such situations.