3Blue1Brown

Who cares about topology? (Inscribed rectangle problem) (2016x20)

Air date: Nov 04, 2016

An unsolved conjecture, the inscribed square problem, and a clever topological solution to a weaker version of the question, the inscribed rectangle problem (Proof due to H. Vaughan, 1977), that shows how the torus and mobius strip naturally arise in mathematical ponderings.