Like a Hamster

Recently as i was going to my office, i saw that the neighboring office was open. Since i had not seen Guntram for a while i decided to stop by and say hallo. This ended up being a fatal error. This evil guy,

Guntram explaining some complicated stuff (or is he just taking a pose?)

had brought some equipment with him. Unsuspecting, i started to toy around with it, quickly forgetting the time flying by… Somehow, we mathematicians are, i believe, strongly attracted to problems that look quite simple on first glance, but are actually very deep. This one was one of those and is to the mathematician what a wheel is to a hamster…

The culprit and a pretty good book