K-Nearest Neighbors

“If it walks near k other ducks, then it probably is a duck.”

Setup

Imagine there is a lake with lots of birds hanging around: ducks, geese, cranes, herons, and so on. We can see each bird clearly enough to tell what type it is.

Problem:

Now imagine there is …

in misc · Sat 15 May 2021

Design your own hexaflexagon

Hexaflexagons are strange, paper creatures made of origami and a sprinkle of magic.

"But it looks like a hexagonal coaster for my coffee..", you say, "what's cool about that?"

What's cool is that this coaster has three sides!

The nice image here is from wikimedia. You will find that there …

in misc · Fri 19 March 2021