Just when you thought quantum physics couldn’t get any weirder, it violates the pigeonhole principle. No, it’s not about a pigeon in a hole that is simultaneously alive and dead. The pigeonhole ...

The Pigeonhole Principle is a really simple concept, discovered all the way back in the 1800s. It has explained everything from the amount of hair on people’s heads to fundamental principles of ...

They say a bird in the hand is worth two in the bush, but for computer scientists, two birds in a hole are better still. That’s because those cohabiting birds are the protagonists of a deceptively ...

We define the notion of approximate Euler characteristic of definable sets of a first order structure. We show that a structure admits a non-trivial approximate Euler ...