#mathvideos — Public Fediverse posts

I knew of the Dirichlet function, but only as a funny example when learning about discontinuous function. Happy to remedy that today by stumbling across this brief video explaining the motivation behind it. It also increased my knowledge about the weirdness of infinities by showing proof that you can always find a rational between two irrationals, and vice versa.
https://www.youtube.com/watch?v=uRluS4KwXu8
#math #maths #mathVideos #Dirichlet #infinity