2023-05-14T08:36:45

Q: What's the contour integral around Western Europe? A: Zero, because all the Poles are in Eastern Europe! Addendum: Actually, there ARE some Poles in Western Europe, but they are removable! Q: An English mathematician (I forgot who) was asked by his very religious colleague: Do you believe in one God? A: Yes, up to isomorphism! Q: What is a compact city? A: It's a city that can be guarded by finitely many near-sighted policemen! -- Peter Lax